Recent content by tug

  1. tug

    PH Profiling - how do I do it?

    A difference in the drop in pH of 0.7 due to CO2, is around 10 to the .7 power, or about a factor of 5, if I understand the math correctly. Assuming the acclimated water had 3 ppm, you might have about 15 ppm of CO2 in the tank before the CO2 even comes on.
  2. tug

    PH Profiling - how do I do it?

    In most cases were BBA and CO2 are concerned, most of the problems I've had, abated when the added CO2 and CO2 lost, find a balance. This maters more to me then what level it's at. I do not think preventing BBA takes more or less then 30ppm CO2. The plants determine what level of CO2, light...
  3. tug

    PH Profiling - how do I do it?

    It even explains why pH meters that shut down CO2 might be off, when can filters are used. Ian briefly touches on this on his post. Paulo, you just like anything ian-m posts.
  4. tug

    PH Profiling - how do I do it?

    Maintain good gas exchange at the water surface and O2 levels is what I meant, i.e., not doing these things causes fish stress, especially when CO2 levels are higher. A water sample that reached ambient CO2 levels outside the tank.
  5. tug

    PH Profiling - how do I do it?

    I can not be 100% sure that someone else's tank is gassing off all of it's CO2 an hour or two after CO2 and lights are out. Mine does and in the morning, before the CO2 comes on I can use it to check for pH. Your water sample would suggest that your tank does not (work on that) meaning, you...
  6. tug

    PH Profiling - how do I do it?

    You want to be sure all of the CO2 in your sample has reached ambient CO2 levels of about 2-3ppm by letting a sample sit for a day. Then a drop in pH of 1-1.2 degrees, irregardless of KH, corresponds to 30ppm CO2. My personal experience with this method made me realize how little CO2 I was...
  7. tug

    Iron deficiency with EI

    I'm not sure I would agree. More NPK+Fe -> higher uptake of NPK+Fe seems to be correct. PO4 and CO2 do have a relationship. It may have more to do with increasing efficiency - not what is a needed CO2 level. Something that always helps me is to remember that plant growth will increase in low...
  8. tug

    Iron deficiency with EI

    With your KH what it is, the chelates will have a tendency to break off soon after they are dosed but I don't think it matters. The Fe EDTA in Plantex lasts for 36 hours or so - remaining available to the plants. You might try using more DTPA Fe relative to ETDA Fe but it has more to do with the...
  9. tug

    Iron deficiency with EI

    Drop checkers do have a lag time, often an hour or so but the drop in pH your providing sounds excellent, if your sure of your surface water clarity. Adding H2O2 is a little like a drug dependency - find a way to kick it. If it bleached your plants, look for new green growth. If this all...
  10. tug

    Iron deficiency with EI

    I'm not a big proponent of filters as reactors but it does sound as if your CO2 is above 30ppm most the day. I did not look into your light, though it sounds sufficient. As far as adding additional iron, at 2-3 x EI, using various types of chelated Fe at the 4:1:1 ratio is a safe move. Is it...
  11. tug

    Iron deficiency with EI

    Sorry, I posted the wrong link. http://www.barrreport.com/forum/barr-report/co2-enrichment/2951-old-no3-growth-optimal-test-from-paul-krombholz/page2
  12. tug

    Iron deficiency with EI

    Hobby PO4 test kits are heavily influenced by the hobbits through misuse, IMHO. I do not think ardjuna is one of those hobbyists. Plants having a Mg deficiency would have dark veins with lighter leaf tissue but it's worth asking - a picture would be helpful too.
  13. tug

    Iron deficiency with EI

    There are several situations that can cause a plant to grow white/yellow leaves. Iron deficiency, carbon deficiency, nitrogen and even Calcium deficiency. I have also heard that overdosing excel can cause a bleached effect on some plants, stem plants mostly. Without asking Jaap a few questions...
  14. tug

    Iron deficiency with EI

    Yes but I have also heard dosing liquid carbon at high levels can cause some plants to turn white. As for dosing higher levels of iron I would be careful of adding too much Plantex as your sole source of iron. You can add Fe DTPA and Fe Gluconate to Plantex CSM+B, i.e., CMS+B, Fe Gluconate and...
  15. tug

    Making ferts

    The way I understand it is KH (not pH) has an effect on the ligand/chelator used. In very hard water the bonds are more easily broken, some faster then others. For an example, DTPA stays bonded to Fe longer in your hard water then EDTA would. Gluconate would last the least amount of time. When...
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