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Actually, I made a calculation with the known ingredients of TPN a couple of years ago and compared them to the EI trace levels recommended by Tom Barr. This is the result: To reach EI levels in a planted tank with weekly 50% water changes you need to dose 50 ml / 50 l / day. As Tropica...

At least two important lessons here! Thanks for that. I have a very important question to the second issue: With all other conditions ideal - non-limiting nutrients and CO2, proper Ammonia breakdown (filtration), regular water changes, etc. - can low O2 level by itself induce algae? Diatoms...

I have to confirm. For some reason I have extensive feedback from users of an all-in-one solution that we sell that GSA is well present with around 3ppm PO4 in the tank. I wonder what Mr. Plantbrain's opinion is on this. I do not think that EI in it's current form is "outdated" though :). But I...

Nothing to add here, I'm with you on the necessity to simplify things. :idea: I have asolutely no idea what you mean by flavor diversity though. ;) We do not have Ben & Jerry's here - but I'll make sure to assault one next time I'll ravage the overseas anglo-saxon lands. :D Now that I...

I have. It was not EI though. It was TPN+ (low on K). I had to compensate with K2SO4 to get rid of deficiency - I was succesfull at that. I made no other changes. It was a cycled tank, proper CO2 dissolving and distribution, etc. I remember you told me once something like that the EI dosage...

It obviously depends on the K amount of the tap water, but my experience tells me that you can simply not add enough K with KNO3 to get the coreesponding EI levels of K and NO3 in the tank. Most of the times you need to add K2SO4 - here in Hungary anyway - to compensate for the lower molar...

Thanks! Yepp, exactly. If you do it all-in-one, than all the values should be the same. If you mix separate solutions, you can add separate quantities from each. Some would like to make different solutions for all the macro powders separately. James has acutally more than one mix - he has one...

Yepp, it seems to be some Excel version number problem... Messing with just the orange bkgd cells would result in problem-free calculation. This is verified by many.

You're absolutely right. When looking to what they actually do I tend to agree. When listening to them... Well. :) Even their catalogues are full of spelling mistakes and vague translations. I'm not a native English speaker, but this sometimes gets me too. ;) ADA! get a decent English-speaking...

I have recently stumbled upon an ADA AquaJournal article, and have found some statements that seem to contradict my EI views. Excuse me? :) Nutrients cause algae? I thought we are well past that theory. ;) Absolutely not. Frequent water changes are needed to get rid of Ammonia. Then of course...

I moved it to our server. The new link should work fine. (update 05.09.2009 - there was a typo, the EI top range for the Fe was 5 instead of 0,5 - mistake corrected.)

Here's my side of the TPN+ dosing story: I have a 20 liter nano tank and dose 3ml (60 drops) per day from the TPN+. That would mean a 1,9 ml (37 drops) for your 12,5 liter tank. With the big hardscape I would dose about 1,5 ml/day. I originally started with the amounts suggested by George but...

Also, you can use my excel calculator, which will automatically give you all the amounts in teaspoons too.

Well, actually - if you look at the EI - the TPN+ is low on Potassium, so using KNO3 would help correct that problem too. (Just for the record, it is low on PO4 as well.)

Yes, you are right (as usual) :). Thanks! What are those 3.8g and 2.9g Ammonium Nitrate values on your site?

OH, I just realized that I was looking at the fert quantities posted on your site, theplantedtank.co.uk which show different dosage values than the ones posted here (same results though). With the data you posted here on this forum earlier, I can in fact verify that your first calculation (the...

James, I checked your values with my Excel Calculator (you can download the modified calculator from here). I used the molecular weights from this site. I compared some of the results from this site with your molecular weight data and they match. It looks like I get different results with the K...

I know that the primary goal here is to reproduce TPN+ exactly, but here's the question: Why would someone dose ammonium nitrate on purpose when one can dose potassium nitrate? Isn't reducing ammonium levels in the tank the whole point in fighting algae? In what way is dosing NH4NO3 better for...

I updated the dosing calculator from the first page of this topic. Now it includes Trace Elements Mix dosage calculation and a "How Much To Order" box to determine the quantities of powders needed for a certain period of time. Thanks to Henrik for the new ideas and to James (again!) for helping...

I guess - nowhere! James presumably did not take the double Fe value in this particular Micro+ mix into consideration when posting his answer. Remember, that Haack has two types of Micro+ mixes with HEEDTA chelates, the one I ordered contains double Fe. The other one contains the "normal"...

James, thanks for your guidance! Cheers.

I just received my concentrated Trace Elements Mix (Micro+) that contains the following: Fe 38 g/l Mn 9.6 g/l Cu 0,48 g/l Zn 2,4 g/l B 3,5 g/l Mo 0,70 g/l (HEDDTA chelates) I did not find anywhere the EI dosing recommendation for the traces. Can you tell me what is the non-limiting range for...

OK, it's over, done, the end. :) Will mix the nutrients tomorrow (using a regular teaspoon), all of them in different solutions to be able to adjust separately and will overdose the EI range at the beginning. Thanks!

Paulo, Clive, thx for the answers. Chuck's site proved really useful. I added his teaspoon measurements into my excel file, now it looks like this: Now please explain me this: how on earth do I add 0,46 teaspoon Potassium Phosphate to the mix? I just won't be able to measure half of a...

Have been looking for a good description on how to measure dry ferts with a teaspoon for some time now and could't find an answer anywhere, except that 1 teaspoon is approx 6g. Is that a "flat filled" teaspoon or what? :) How do you go about the dry fert weights and how do you measure 1/16...

Cheers Clive, and thank you so much! Your answer clarified many things I was wondering about for some time now.

Clive, thanks for your answer. The nutrients you listed that are required by the bacteria are in fact the same ones we dose every day to our tanks. Should't those be enough to provide for them - assuming they can use the organic products released by the fish instead of plants? My theoretical (!)...

My calculator has all the molecular weights right (taken from James' site) and it's easy to use. Just type in the KNO3 quantity and you'll get the K and NO3 mass instantly... My point, exactly. If you have no K in your tap water, not even double TPN+ dose is enough. What I did at first is...

Re: I always wondered, why is that so? What kind of stabilizing is needed at the beginning? What needs to be stabilized? Isn't the point to get enough nutrients for the plants one has, and ensure that the filter is matured, do regular water changes to reset EI dosage levels, period? The second...

Just out of curiosity I verified Clive's example in my calc and here's his data on chart (to make it simple, I dosed only on Mondays, this can of course be modified to dose 3 times a week or every day - a total of 20 ppm). James, as far as I'm concerned it's good to know that you can add...

...and there's my lesson for the day. Thank you Clive! And thanks for the beer. :)

Well, I actually got my DI water in a Tesco in Budapest, Hungary. :) It was in the car accessories section... Most gas stations have it too... The nutrient levels will gradually grow in the first couple of weeks as with the first filling of the tank, you have your tap water defaults and you dose...

Thanks, Henrik. All I did was to sum up calculations and data from James' site, ideas from Mark, and of course Tom's method. The excel sheet is far from finished and reviewed so please take that into consideration when using. Also, please check back for updates. Yes, you do need to use some...

James, that's where I saw it, thanks mate. :)

Tom, it means a lot to me that you like my calc. There's a lot more to do with it, I'm improving it continuously and adding data. I do fully understand what you suggest that the EI is and what it is not. Please send me more feedback as to what else would you guys see in there on the sheet...

This example has been made to work with my 20 liter nano tank. With these - as George Farmer suggested many times- it is advisable to have frequent water changes. You can modify the days and amount of water changes on the chart to fit the more common 3 days/week makro dosing and once-a-week 50%...

Thanks Aaron. My stupid late-night mistake from yesterday... I left the 2ml as a default value so it did not take the changes in TPN dose in consideration. Mistake corrected, you can download it again from the link above. Also, I did a major "rescape" on the chart :) to make it more usable for...

I just made an Excel File that can be easily used to calculate the all-in-one solution dosing quantities needed to comply with the EI range of nutrients. The chart can be customized to any regime of water changes and can be used to mix a solution with dry ferts. I used fert amounts from the DIY...