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Search results for query: duckweed index

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  1. MichaelJ

    PAR meter apps, android and iOS

    ...the optimal spectral distribution team... just as I joined the lean fertilizer team after being extremely skeptical initially, or the no bio filtermedia team or the duckweed index team... (those ones didn't take much persuasion though) ... well, as long as it works! right.. :) Cheers, Michael
  2. MichaelJ

    How strong should i have my light?

    ...category wont require much light. Some stems absolutely prefer high light... if you plan for a good coverage of floating plants (see Duckweed index) you may need to run it higher even, so it really depends. Personally, I keep my lights fairly moderate to low.... it's really one of those...
  3. dw1305

    Nymphoides and Cryptocoryne are melting, but epiphytes thriving. Whats going on?

    ...to water">, rather than take them away. You will need to swap to <"complete fertiliser"> at some point, <"Tropical Specialised"> would do. As you have <"floating plants"> already you can use these (they aren't CO2 limited) to monitor nutrient levels via the <"Duckweed Index"> Cheers Darrel
  4. dw1305

    Little 20l AIO

    Hi all, Perfect, I'd thin them back to 50% and then have a review (and / or thin) next week. They look pretty healthy, you could try the VIMI RRF index and see if the RRF changes colour and / or growth slows. I've found that <"Riccia fluitans"> doesn't do well for me, but give it a bit more...
  5. dw1305

    Tropica Substrate ammonia problem:

    ...perform nitrification. Have a look at <"Correspondence with Dr Ryan Newton - School of Freshwater Sciences, University of Wisconsin—Milwaukee"> & <"Dr Timothy Hovanec's comments about Bacterial supplements">. Add some floating plants? <"What is the “Duckweed Index” all about?">. cheers...
  6. dw1305

    IFC Aquarium Fertilizer Calculator

    ...& @John q mention. If you did want to go down the chick grit route? You could leave out the calcium chloride (CaCl2.nH2O). The <"Duckweed Index"> was really designed for low tech plant keepers, but you can use it <"any situation">. I like lean dosing ("petrol fumes"), but others will use a...
  7. P

    IFC Aquarium Fertilizer Calculator

    Hello Darrel, thank you for your reply. Yes, I currently do have a CO2 system going. It's actually working since day 1 and unlike the fertilisers I have not tried to stop using it but am not excluding the possibility. I'm using Seachem Equilibrium because at the beginning of the aquarium I...
  8. Hanuman

    IFC Aquarium Fertilizer Calculator

    Plants can grow more than satisfactorely with half (and even less) the dose of full EI. Remember these numbers are mere guidelines and I don't know many people, if anyone in fact, using full EI nowadays. These full EI dosing levels are reminicent from the early days of when Tom Barr popularized...
  9. P

    IFC Aquarium Fertilizer Calculator

    ...a lean dosing regime that will keep the plants going without the need for a lot of water changes (will also have a look at Darrel's Duckweed Index suggestion as I've never heard of it before). I should have perhaps mentioned that this is my first planted tank, it's just over a year old...
  10. dw1305

    IFC Aquarium Fertilizer Calculator

    ...add as a remineraliser, they are both the same ion. I agree with @Hanuman, it is very unlikely that you need the full EI addition, but if you did need more potassium (K) and calcium (Ca)? They will do. If you aren't adding CO2? You might be interested in the <"Duckweed Index">. cheers Darrel
  11. S

    Water advice

    Thanks for the links, lots of reading to do 👍
  12. MichaelJ

    Water advice

    Frogbit will procreate very quickly if they have enough nutrients ( Duckweed index ) and as your tank matures. By that time you probably wont need the surface skimmer anyway but it wont hurt to keep it in there for the aeration. Cheers, Michael
  13. M

    Substrate Advice Needed - Established Tank

    Is this the information about our water I’m looking for? I have had plants in from as little as 2 weeks to as long as 4 months and I have seen a very, very small growth on the older plants which is why I was considering aqua soil as I want the plants and fish to thrive. I have a small amount...
  14. L

    Substrate Advice Needed - Established Tank

    ...stems you might not even need to do that. And adding a floating plant such as limnobium laevigatum (see @dw1305 's What is the duckweed index? post). That will help you troubleshoot any nutrient / fertiliser issues and help get the plants growing rather than standing still (as it were)...
  15. dw1305

    Help with Elodea densa

    ...get <"fairly instant greening">. I'd just ignore what you read on other forums etc <"about nitrate (NO3-)">, it is mainly <"written by people"> who don't really understand what they are talking about. Have a look at <"What is the “Duckweed Index” all about?"> and subsequent posts. cheers...
  16. megwattscreative

    Very first tank (planted, low tech)

    ...be careful! On the plus side, the benefit of a half-full tank is I know any known jumpers will stay contained ;) Thanks to @dw1305's duckweed index, the rotala butterfly calculator and some helpful threads on Chempak sequestered iron dosing, I've started very minimal chelated iron doses...
  17. dw1305

    Recently setup dirted tank...looking for thoughts/guidance on approach

    ...The<"IFC Aquarium Fertilizer Calculator"> will give you a lot more options. In terms of when to add iron? I'd use the <"What is the “Duckweed Index” all about: and why we need to talk about iron (Fe)."> and subsequent post <"We've talked about iron deficiency, but what are going to do about...
  18. dw1305

    Any ideas on the cause?

    Hi all, It looks like the plants have been iron (Fe) and/or magnesium (Mg) deficient in the past and the new foliage is healthier. <"What is the “Duckweed Index” all about? - When the Duckweed Index breaks down."> cheers Darrel
  19. F

    New tank after 5month wait

    Thanks Darrel I think the plants are doing ok, i would prefer an NO3 number below 20ppm I have been monitoring surface plants and am adding Mg, occasionally Mn, and Fe Some of the plants grow like weeds, my tropheus appreciate this 😂😂 I cannot grow stem plants (planted), as the plecs just dig...
  20. dw1305

    New tank after 5month wait

    ...<"Basically that">, but you can reduce the amount of fixed nitrogen you add via fertilisers and water changes, just use the <"Duckweed Index"> to keep your plants in active growth. Partially why I don't worry about <"nitrate (NO3-) accumulation"> is that when you thin your plants you are...
  21. Clemson13

    Front Loading

    I have been really tempted to target 15ppm. I read about diluting the drop checker solution 50/50 with RO. Long term, I would rather run a tank this way for the sake of the fish. But I don't want to add to much complexity at the start. I would be scared to skip CO2 entirely, as most of the...
  22. dw1305

    Front Loading

    Hi all, I'd stop the CO2 (or just add ~ 15 ppm?) and then you can use the <"Duckweed Index"> to keep you in the "Goldilocks Zone" - <"Low Tech Fertiliser Dosing. Whats your technique?">. Because your fertiliser addition is based on the growth of a non-CO2 limited plant, you can modify your...
  23. dw1305

    Plant deficiencies and the Fe Experiment

    Hi all, No, it isn't essential. I use 95% sand, <"but don't vacuum etc">. Partially why I chose a floating plant for the <"Duckweed Index"> was to take the complexities of what <"happens in the substrate"> out of the equation. Cheers Darrel
  24. dw1305

    "Lowish Mediumish tech" Aquarium? Oase Highline 400

    ...the tank water. I don't use CO2 and I use a floating plant as both my nutrient sponge and nutrient level indicator <"What is the “Duckweed Index” all about?">. Because it is a floating plant, it has access to <"atmospheric CO2"> and it is never CO2 limited. You can, but it is an expensive...
  25. richardcunliffe

    "Lowish Mediumish tech" Aquarium? Oase Highline 400

    ...So far things seem ok apart from a bit of BBA. Very curious to know how long it will last this way, so getting some floaters for the 'duckweed index' I'm no pro, but I'd say if you want to disconnect your CO2 then do it . I think most of your plant list will be fine without. Another...
  26. dw1305

    Back to freshwater after 20 years - help! :)

    Hi all, Good idea. Have a look at: <"What is the “Duckweed Index” all about?">. Part of the <"rationale for the Duckweed Index"> was to reduce the need for water testing etc. cheers Darrel
  27. F

    New tank after 5month wait

    Thank you I will have a read, your info is what led me to add Mg, I suspect that you are correct and Fe will also be required I should really make an effort to get some pictures of the plants up, the tank looks pretty ok (to me), but there is always room for improvement The only algae issues I...
  28. dw1305

    New tank after 5month wait

    H all, You need to watch out for the first signs of iron (Fe) deficiency. Have a look at "When the Duckweed Index breaks down" - <"What is the “Duckweed Index” all about?">, cheers Darrel
  29. L

    Your my last hope people!

    is that a pic of your tank @dw1305 ? #verdant
  30. dw1305

    Your my last hope people!

    Hi all, That is why I needed a floating plant for the <"Duckweed Index"> it takes CO2 (and, nearly always, light) out of the equation. Once you've excluded them? That only leaves the mineral nutrients. If you end up with this <"C02 ISSUES">? You know that you are supplying all the nutrients...
  31. dw1305

    Small background plants for nano tank?

    ...big eventually, but only really slowly. Over time I've got rid of all my stem plants, and I just use a floating plant <"What is the “Duckweed Index” all about?"> as my "stem" for <"nutrient reduction duties">. For <"slow growing plants"> I mainly use epiphytes, so mosses, ferns and Aroids...
  32. dw1305

    Few questions about DYI CO2 with yeast

    ...an old aquarium, Juwel Rekord 72, and other ramblings">. You don't need CO2, a lot of people don't use it. Have a look at <"Cryptocoryne Parva Carpet"> & <"What is the “Duckweed Index” all about?">, it talks about the "aerial advantage" that floating (or emergent) plants have. cheers Darrel
  33. dw1305

    Cannot Grow Plants

    ...so you definitely aren't alone. I'm not too bothered about flow and I use a lot of epiphytes and floating plants and the UG filter isn't a problem for these. When you have time read through <"What is the “Duckweed Index” all about?">, it should cover everything you need to know. cheers Darrel
  34. dw1305

    Algae - Where to start your fight?

    Hi all, Unfortunately only when <"new leaves grow">. Have a look at - <"Duckweed Index says Nitrogen please?"> & <"Plant deficiencies and the Fe Experiment">. The plant can't move iron (Fe) around the plant to new tissue, or store it for a <"rainy day"> - <"Should i start to fertilize?">...
  35. richardcunliffe

    Marsilea Crenata die off and BBA advice/help

    @dw1305 This duckweed index is pretty interesting stuff. I need a comfy chair and a coffee. Let's say you get the nutrients nailed, are there particular ways to maintain a marsilea crenata (minutia) carpet? Mine seems to be spreading and with new growth that looks ok, but older growth dies...
  36. C

    Moving fish temporarily into much larger uncycled tank

    ...the rescaped is cycled. Btw the holding tank is 54L with only three guppies, 2 pygmy cories and 2 amanos in it. Bioload should be minimal, you reckon? @dw1305 Most certainly. I've learnt from your duckweed index post and moved all my amazon frogbit and red root floaters to the holding tank.
  37. A

    G'day mate! .... from Australia 🇦🇺

    Thank you for your responses and the links. I'll be sure to read them thoroughly. My degassed tank pH is 7.4 CO2 injection drops it to 6. About 3 dKH Here is the recommendation for the micros I use.. " Suggested dose is 2 ML per 10 gallons 3x per week along with 50-60% water changes One...
  38. dw1305

    G'day mate! .... from Australia 🇦🇺

    ...substrate may also have still had some ability to soften the water, which would make iron more soluble. Have a look at <"When the Duckweed Index breaks down">, and the next two posts <"........... and why we need to talk about iron (Fe)"> & <"We've talked about iron deficiency, but what are...
  39. dw1305

    Moving fish temporarily into much larger uncycled tank

    Hi all, Add a <"floating plant">? It has the "aerial advantage" <"What is the “Duckweed Index” all about?"> cheers Darrel
  40. ScareCrow

    Kh dropping

    Thanks Darrel, I did go on a bit of a rain water 'quality' improvement drive when trying to breed my corydoras eques so tds, gh and kh are all lower than normal.
  41. dw1305

    Kh dropping

    ...tap water every week (a bit like EI) or wait until the shells start to show some attrition and add some tap water then (a bit like the Duckweed Index). Possibly, but the plants should have more access to CO2, and that is the <"kinetically efficient form" of <"Total Inorganic Carbon"> (TIC)...
  42. MaterialCrab

    Eheim Vivaline 240 Journal - Medium Tech

    This is a description from the website in relation to the product I'm using. "Fe Hybrid is a unique preparation containing iron in two forms: Fe + 2 Fe + 3, which ensures its maximum use by plants. Iron from Fe + 2 is immediately available to plants, while iron from Fe + 3 is released more...
  43. dw1305

    Eheim Vivaline 240 Journal - Medium Tech

    ...says"> Which is quite entertaining (and mostly true), but also <"sadly irrelevant">. I'm using <"Solufeed 2 : 1 : 4">, via the <"Duckweed Index questions"> & <"What is the “Duckweed Index” all about?">. @Happi has written a very useful user guide to <"Solufeed fertilisers">: <"Solufeed...
  44. MaterialCrab

    Eheim Vivaline 240 Journal - Medium Tech

    I've picked up Hybrid FE plant one which is an iron fertilizer and also got a bunch of Amazon Frogbit. I'm going to move into the dry fertz once I've used up the easy life products I've purchased. Any recommendations on where to pick them up? I'm based in Ireland so EU shipping or from the UK...
  45. M

    TNC Complete dosing

    Hey Darrel, I only added these a week ago from an in-vitro pot so I don't expect them to look too great just yet although I will attach a picture for you of them. There does seem to be new shoots on a few of them which looks positive atleast 🤞 Even though I know floating plants are a huge help...
  46. dw1305

    Eheim Vivaline 240 Journal - Medium Tech

    ...is often an issue. This is <"Friday's post">, and I'm still available for <"Tarot card readings">. Have a look at <"What is the “Duckweed Index” all about?"> and <"subsequent posts">. This is a Bacopa caroliniana showing iron deficiency (the white area) and subsequent recovery (the green...
  47. dw1305

    TNC Complete dosing

    ...mineral nutrient (fertiliser) related. <"Global Monitoring Laboratory - Carbon Cycle Greenhouse Gases"> Have a look at <"What is the “Duckweed Index” all about?">, it is quite a long thread, but should cover all the bits of interest. All floating plants fulfill this same role, the major...
  48. dw1305

    Recently setup dirted tank...looking for thoughts/guidance on approach

    ...it ain't broke, don't fix it">. @Tim Harrison wrote <"Soil Substrate or Dirted Tank - A How to Guide">, and I wrote <"What is the “Duckweed Index” all about?">, because we thought they would help people become more successful planted tank keepers. I don't think we are telling you to...
  49. K

    Recently setup dirted tank...looking for thoughts/guidance on approach

    ...degass in a cup for 24 hours then re-test) , I would add some DTPA iron every so often. A friend of mine with a low tech tank (very little water changes), finds a little bit of DTPA iron dosing helpes green up the leaves. Use the frogbit / duckweed index to see if the new leaves go a darker...
  50. dw1305

    Recently setup dirted tank...looking for thoughts/guidance on approach

    ...revises"> & <"Anoxic filtration: An Interview with Kevin Novak. pecktec video link">. "TNC Complete" is fine. You can use the "Duckweed Index" to indicate when you need to feed your plants <"What is the “Duckweed Index” all about?"> You don't need it. Opinions vary, some of us use <"a 12...
  51. MaterialCrab

    Eheim Vivaline 240 Journal - Medium Tech

    Thank you so much for this informative response. I have read that about the fertilizers that are sold in shops. I do plan on switching things up once I've used up what I've already purchased. A quick question about the index. Does this apply to all floating plants? After research I really like...
  52. dw1305

    Eheim Vivaline 240 Journal - Medium Tech

    Hi all, Yes, that is looking good. <"I do">, they have a multitude of advantages - <"What is the “Duckweed Index” all about?">. <"One advantage of a floating plant"> would be that they will tell you when your water column is deficient in nutrients, which will eventually happen as the...
  53. dw1305

    My Aquarium Journey - Sharing Experiences and Seeking Advice

    ...I'm going to tell you that you have shown us a have a really accurate and precise test kit in this photo, and that test kit is the "Duckweed Index" - <"What is the “Duckweed Index” all about?">. Also, as you have Red root Floater (Phyllanthus fluitans) the <"VIMI RRF and nitrogen"> pages may...
  54. dw1305

    Low Tech Juwel Lido 120

    Hi all, That looks good. In terms of the fertiliser addition you can <"add a limited dose now">, or you can just use the <"Duckweed Index">. Cheers Darrel
  55. L

    Help reading this picture

    ...in the tank. Been a few weeks. Overall some are growing like crazy, but I'm now seeing netting on some. @dw1305 's 'What is the Duckweed Index all about?' suggests Iron deficiency. Keen to nip this in the bud. I'm currently dosing 1ppm FE, once a week, in addition to the 0.5ppm in my...
  56. dw1305

    Is Tom Barr's Approach Still The Go To Approach For Low Tech?

    ...you don't need to worry about <"ratios or trying to measure"> the amount of nutrients in the water column. I think that where the <"Duckweed Index">* has an advantage <"over all other methods"> is that you can use it for both <"lean dosing and triffid">. *Although I may not be an entirely...
  57. PlantMan216

    Need some help with RO water info

    Hey! Thanks for the info! What you said makes a lot of sense and I am starting to have a good understanding of everything now given your and other information and connecting everything. As far as ferts I think now I might just buy my own salts and make my own blends. The EI was an interesting...
  58. dw1305

    Need some help with RO water info

    ...a dechlorinator that <"will deal with chloramine">. It is almost certainly a mineral nutrient issue, have a look at <"What is the “Duckweed Index” all about?">. It is a good video, but the Seachem product placing is really disappointing to be honest, he must have known that he was being...
  59. dw1305

    Is it possible?

    ...of plants he is very much talking to the converted. Eric if you are reading this, you might be interested in <"What is the “Duckweed Index” all about?"> That would be the real worry for me. I get some correspondence from people asking me about <"FatherFish"> or <"Kevin Novak">, and often...
  60. dw1305

    When to add fish!

    ...growth"> is that it is fish safe, you don't need to know anything else, you can <"just use your eyes">. Have a look at <"What is the “Duckweed Index” all about?">. There <"isn't any ambiguity">, I'm interested in the <"science of probability"> and my opinion is that "grown-in" is the method...
  61. dw1305

    Is Tom Barr's Approach Still The Go To Approach For Low Tech?

    Hi all, I think so. It is very much "go big or go home" and a lot of people end up completing both options in quick order. At least if you use <"seasoned tank time"> and the <"Duckweed Index"> it takes longer to get to the "give up" option. cheers Darrel
  62. dw1305

    Ambiguous lighting requirements and useless numbers.

    ...Ludwigia sedioides">, they need plenty of everything <"https://www.ccfg.org.uk/wp-content/uploads/2017/11/Conf09_PBurgess.pdf">. That was definitely a reason for wanting a floating plant for the <"Duckweed Index">, both access to CO2 and adaptation <"to high light intensity">. cheers Darrel
  63. dw1305

    Unhealthy plants and troublesome algae

    ...What the others have said after that, it looks OK, you just need some <"more plant mass">, I like a floating plant <"What is the “Duckweed Index” all about?"> and <"Plant Profile - Ceratopteris thalictroides"> but with CO2 addition that is less important. You need to add a <"complete...
  64. S

    Unhealthy plants and troublesome algae

    ...benefit from floating plants to suck up some excess nutrients and keep an eye on the nutrient levels in the tank (look up Darrel’s duckweed index - can’t do a link on my phone). I’m only speculating as I’m quite new to this myself but I seem to be doing okay plant wise with my set up based...
  65. dw1305

    Is Tom Barr's Approach Still The Go To Approach For Low Tech?

    ...for starters: <"Help needed with 0 Nitrates Levels">? and this one for managing the tank once it is up and growing <"What is the “Duckweed Index” all about?">? It borrows from both Tom Barr (@plantbrain) and <"Diana Walstad">. The main advice I don't like for a low-tec is "don't change...
  66. dw1305

    Can I use my water ?

    ...<"complete fertiliser">. Some people will dose regularly, others will use a "just in time" philosophy. Have a look at <"What is the “Duckweed Index” all about?"> it is a long read, but worth it (I may not be an entirely unbiased commentator). In terms of fertiliser, some of us have been...
  67. dw1305

    Should I add co2 to existing aquascape

    ...on the plants, on keeping them healthy and building up the plant biomass. I like a floating plant, either as a sub-surface floater <"Using stem plants as a filtering aid at Start Up!"> & <"C02 ISSUES"> or as a obligate floating plant <"What is the “Duckweed Index” all about?">. cheers Darrel
  68. dw1305

    Estimative Index

    ...1 dGH and 1dKH. I'm not an <"Estimative Index"> user myself (I'm low tech and don't want <"optimal plant growth"> - <"What is the “Duckweed Index” all about?">), but the calculations look right. You can check on the <"Rotala Nutrient Dosing Calculator">. I've just checked with potassium...
  69. dw1305

    Maq's Substrate Experiment

    Hi all, I did, but I'm so technically incompetent that I can't do links on the phone. Cheers Darr
  70. MichaelJ

    Maq's Substrate Experiment

    I am sure you meant <the gift that keeps giving>. :lol: I stole that quote from here. Cheers, Michael
  71. dw1305

    Hi everybody,

    Hi all, That was one of the reasons for keeping a "floater" in the tanks - <"What is the “Duckweed Index” all about?">. I originally chose a floating plant so that it had access to atmospheric CO2 <"Global Monitoring Laboratory - Carbon Cycle Greenhouse Gases">, this is Diana Walstad's...
  72. RickyV

    3000 Liter High Tech Planted Tank

    ...I hear CPDs can eat planaria, though I probably don't have enough to make a dent. Cool! I'm just hoping I can really reduce them. I'm sure I'll need a whole bunch of traps. Yeah I'm just gonna stick with looking at the plants. The duckweed index has been showing I have plenty of nitrogen.
  73. dw1305

    3000 Liter High Tech Planted Tank

    ...before you have a coloured compound that you can measure. I'd just go with that. There is a discussion of that in <"What is the “Duckweed Index” all about?">. Edit: I think it was on the <"2hr Aquatist"> site that I saw the original mention of redder Red-root Floater. Further edit...
  74. RickyV

    3000 Liter High Tech Planted Tank

    ...I've been growing some red root floaters in here. I was reading on 2 hr aquarist they are another way to measure nitrate levels. I'm gonna start using them and frogbit for my duckweed index. Here's some fish footage for those interested. Bubbles in the beggining from H2O2. Full tank shot.
  75. AquaJoe69

    Seachem stability=cloudy water?

    Thanks for the reply, but it made me possibly more confused than before, is there any test that yourself use that you can recommend or do you go more by signs on the plants and other observations in the tank do take the apropiate means to deal with stuff?
  76. dw1305

    Seachem stability=cloudy water?

    Hi all, That sounds promising. Semi-titrimetric tests ("count the number of drops"), ideally <"with a standard"> included, are usually better than test strips etc. but I have <"some reservations"> about nearly all test kits available to us <"Testing kit recommendations">. I <"like a...
  77. Happi

    Plant deficiencies and the Fe Experiment

    But, what ppm were the daily/weekly target for each of these DTPA, EDDHA & Seachem Iron, Mn ? was Mn chelated? if you can already provide RO water to your setup, I would suggest going 100% RO and Mineralize it with needed Minerals and Nutrients.
  78. K

    Plant deficiencies and the Fe Experiment

    ...=<0.2PH. My plants have much better form, and I have reduced my iron mix dosing by 50%. I did notice after doing this the Frogbit (Duckweed index) appeared less green, and started to get eaten by my shrimp. This I think was the first sign of iron deficiency creeping in again. I have also...
  79. dw1305

    Dark start questions

    Hi all, We have a thread <"Correspondence with Dr Ryan Newton - School of Freshwater Sciences, University of Wisconsin—Milwaukee"> which is well worth reading, and this was what Dr Newton said: If you don't have an ammonia rich substrate? I'd recommend planting and then just aim to feed...
  80. dw1305

    Dark Start and soaking wood

    Hi all, A "dark start" sounds a good idea. I'm a floating plant fanatic, but they really help. One advantage is you can just "watch the plant" so it takes a way a lot of the <"uncertainty associated with water testing">. cheers Darrel
  81. dw1305

    Dark Start and soaking wood

    ...as a filtering aid at Start Up!">. You can always add a floating plant, it will start the seasoning process and won't become algae covered etc. Have a look at <"What is the “Duckweed Index” all about?"> and <"Amazon Frogbit (Limnobium laevigatum) phytoremediation references">. cheers Darrel
  82. A

    Cloudy Water Hazy Water and Algae!

    Hi all, As noticed sth new, and quickly shot photo of it. In fact I regret I haven't got a chance make a photo yesterday or the day before yesterday. One of my cryptocorynes released new leave. The new leaves looks very twisted, curled. Yesterday I received floater limnobium levigatum, added...
  83. dw1305

    Maq's Substrate Experiment

    Hi all, That is the problem, the <"unknown unknowns">. Personally I'm willing to trade any short term enhanced growth for longer term stability, so I don't really <"see a need"> for aquasoil type substrates. I know @_Maq_'s thought process goes along the same lines <"Cloudy Water Hazy Water...
  84. dw1305

    What is the “Duckweed Index” all about?

    ...Aquarium" is now in its 4th Edition*. <"Planted Aquariums">. I'm unashamedly a fan, and I wouldn't have ever come to create the <"Duckweed Index without her book">, but <"there are certain things"> in the earlier editions of the book that she has subsequently revised:. <"Walstad revises">...
  85. dw1305

    Maq's Substrate Experiment

    Hi all, Personally I'd go down the FeEDDHA and <"pink tinge route">. We all tend to have the <"same water parameters in the SE of UK"> (away from the Weald). cheers Darrel
  86. L

    Maq's Substrate Experiment

    Hi Maq. Happy new year. Thanks for your research. Based on your early indications… Would an aqua soil tank benefit from a little additional iron (chelate?) to help it start well? My tank has very hard water*, 400tds, 7.7-7.2ph, 5kh and is in a 10 week dark start so I have no duckweed /...
  87. dw1305

    High ammonia level

    Hi all, Yes. @Cor has <"done this">. I'll link the thread in later <"when I'm home">. That is it, basically <"use the thing you can observe">, rather than trying to measure things you can't. People who are good with plants are at an advantage, so the question was: how to quantify those things...
  88. dw1305

    High ammonia level

    ...nitrification">, and <"cycling doesn't really exist"> in a planted tank. Have a look at <"Seasoned Tank Time">. Have a look at the <"Duckweed Index">, it is a technique designed to reduce the need for water testing. It isn't that water parameters aren't important, they are very important...
  89. dw1305

    Getting Started with Ferts Dosing

    Hi all, I'm hoping that, over time, some empirical science <"https://www.sciencedirect.com/science/article/pii/S2213343720304504">* does fill in the gaps. (Figure from linked paper). Personally I'm probably just going to <"work on tweaks for improving it in practice">, rather than trying to...
  90. A

    Cloudy Water Hazy Water and Algae!

    This is what i want to learn just to reading properly from plants. And i think i will print some things to have little cheat sheet under my hand. I want to try them with that calculator to make proper calculations but I don't have an excel for the moment. Thank you
  91. _Maq_

    Getting Started with Ferts Dosing

    ...Takashi Amano and Tom Barr's Estimative Index. Yet it would be a mistake to take this position for universal. In my country, par example, EI is not held in much esteem; majority of hobbyists outright reject it. Darrel's Duckweed Index has much more of a science in itself than Tom Barr's theories.
  92. dw1305

    Cloudy Water Hazy Water and Algae!

    ...is your best bet for information. He has <"seen it, done it"> and now has the tee-shirt. <"It doesn't matter">. That is why I like the <"Duckweed Index"> you just watch the plants - <"Duckweed Index questions"> and from there you make all your decisions <"based on plant growth">. cheers...
  93. S

    Getting Started with Ferts Dosing

    ...some submerged plants (one Anubias, micranthemum, eliocharis, planted into Fluval stratum) as well as water lettuce floating as a “duckweed index” indicator. I also have a few plants growing hydroponically at the surface. The water lettuce is growing well so I’m not concerned about nutrient...
  94. MichaelJ

    Miracle Gro dosing for low tec

    Luckily we have a thread: What is the “Duckweed Index” all about? :) Cheers, Michael
  95. A

    Cloudy Water Hazy Water and Algae!

    Hi all, Wow you have really beautifully planted aquarium 🤩🤩🤩 I hope I will get there one day 😃 Yes according to flora grow from colombo it has EDTA and DTPA fe. I decided to add 5 more pumps if 1 pump they recommending per 5 litre. I took out some water for a better surface aeration...
  96. dw1305

    Solufeed 2:1:4 - IFC - low on P,K,Ca - user error?

    Hi all, You need @_Maq_ for <"the ratios">, they are derived from <"Marschner's Mineral Nutrition of Higher Plants"> . - <"GH+KH RO Reminiralzation Product Help.">. @_Maq_ said, in <"Humble and improving display tank">: I will have a different ratio (I don't know what it is, and it will...
  97. dw1305

    Help with plant care (existing plants)

    Hi all, What @_Maq_ says for iron (Fe), there are some images and an explanation in <"What is the “Duckweed Index” all about?">. I'm also going to link in @keef321 thread, <"Cloudy Water Hazy Water and Algae!">, it has <"some fantastic"> before and after photos. Yes, you need RO, DI or...
  98. dw1305

    Cloudy Water Hazy Water and Algae!

    ...always be ~ pH 8 and FeEDTA may not provide enough plant available iron (Fe). Yes, together. Have a look at <"Above 8"> and the <"Hybrid Duckweed Index">. They may initially be greener, but as they perk up I'd expect them to colour up, possibly dependent <"on some other factors">. cheers...
  99. K

    Cloudy Water Hazy Water and Algae!

    ...mixed together provided the best results (I could cause white leaves by stopping dosing either). I highly suggested using Frogbit for Duckweed Index to give you an idea if it is working. For me at first the frogbit would just melt, but after dosing iron, the new leaves would green up (NOTE...
  100. dw1305

    Help with plant care (existing plants)

    Hi all, @BRJP1 you are in luck. I've just finished <"What is the “Duckweed Index” all about?">. It (the "Duckweed Index") uses a floating plant (to take <"CO2 availability out of the equation">) but the <"fertiliser"> and <"deficiency symptoms"> sections are <"applicable to all plants">. The...
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