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what is typical nutrient uptake per day?
Hi! Does anyone know what the typical nutrient uptake per day is from
plants? Chuck Gadd's calculator is great for figuring out how much of what compound to reach target ppms...but if I don't know how quickly this is being used up then it's either a guessing game or I have to test the water every day with cheap inaccurate test kits or buy VERY VERY expensive lab ones. I did get this calculator http://www.fwstingrays.com/DosingCalculator.htm ....but it's assuming daily uptake is 4.5ppm NO3, 1.4ppm PO4, 3.4PPM K, 0.08PPM Fe...is this average? Also, that calculator gives a lot if inaccurate/unbelievable suggestions for dosing...since I don't think all the bugs are worked out---like for my 15 gal it's suggesting 11 ml of KH2PO4 every other day!! If the the calculator worked 100% then it would be ingenius! Right now I have 25-30ppm CO2, 2.67wpg, 6Gh, 15 gallon tank wide, 50% weekly water changes. Thanks Dave. |
#2
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what is typical nutrient uptake per day?
Dave@AquaFlora wrote:
Hi! Does anyone know what the typical nutrient uptake per day is from plants? Chuck Gadd's calculator is great for figuring out how much of what compound to reach target ppms...but if I don't know how quickly this is being used up then it's either a guessing game or I have to test the water every day with cheap inaccurate test kits or buy VERY VERY expensive lab ones. I did get this calculator http://www.fwstingrays.com/DosingCalculator.htm ...but it's assuming daily uptake is 4.5ppm NO3, 1.4ppm PO4, 3.4PPM K, 0.08PPM Fe...is this average? Also, that calculator gives a lot if inaccurate/unbelievable suggestions for dosing...since I don't think all the bugs are worked out---like for my 15 gal it's suggesting 11 ml of KH2PO4 every other day!! If the the calculator worked 100% then it would be ingenius! Right now I have 25-30ppm CO2, 2.67wpg, 6Gh, 15 gallon tank wide, 50% weekly water changes. Thanks Dave. I can't help with the numbers that you seek. They are probably hard to estimate in any case due to the great variability in plants and sources of nutrients. Imagine coming up with a good number for iron dose in a tank with flourite, which initially contains iron but is slowly depleted. Tom Barr has shown how to dose accurately without testing, using the Estimative Index method. It requires large and regular water changes, which is a problem for some. But since you are already doing them, you could implement EI with little effort. You can read the details at www.barrreport.com. George -- |
#3
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what is typical nutrient uptake per day?
Can anyone help with the amount of traces to add? I'm adding 3-4ml every
other day...? My concern is adding too little, not too much. Right now I have 25-30ppm CO2, 2.67wpg, 6Gh, 15 gallon tank wide, 50% weekly water changes. Thanks! Dave. "George Pontis" wrote in message ... Dave@AquaFlora wrote: Hi! Does anyone know what the typical nutrient uptake per day is from plants? Chuck Gadd's calculator is great for figuring out how much of what compound to reach target ppms...but if I don't know how quickly this is being used up then it's either a guessing game or I have to test the water every day with cheap inaccurate test kits or buy VERY VERY expensive lab ones. I did get this calculator http://www.fwstingrays.com/DosingCalculator.htm ...but it's assuming daily uptake is 4.5ppm NO3, 1.4ppm PO4, 3.4PPM K, 0.08PPM Fe...is this average? Also, that calculator gives a lot if inaccurate/unbelievable suggestions for dosing...since I don't think all the bugs are worked out---like for my 15 gal it's suggesting 11 ml of KH2PO4 every other day!! If the the calculator worked 100% then it would be ingenius! Right now I have 25-30ppm CO2, 2.67wpg, 6Gh, 15 gallon tank wide, 50% weekly water changes. Thanks Dave. I can't help with the numbers that you seek. They are probably hard to estimate in any case due to the great variability in plants and sources of nutrients. Imagine coming up with a good number for iron dose in a tank with flourite, which initially contains iron but is slowly depleted. Tom Barr has shown how to dose accurately without testing, using the Estimative Index method. It requires large and regular water changes, which is a problem for some. But since you are already doing them, you could implement EI with little effort. You can read the details at www.barrreport.com. George -- |
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