I am having some trouble with twisted leafs on my AR, and GSA on some plants and the drift wood. I am dosing dry ferts (CSM+B,KNO3,KH2PO4,MgSO4,CaSO4, and K2SO4) directly to the tank EI method.
Co2 at 50-60ppm (no fish/shrimp/snails. Ph drop from 7.5-5.9. Drop checker yellow.) Aqua soil substrate, 2x54w t5ho at 35-45 par at substrate.
PO4: Trying to keep at 2-3 ppm, but keeps bottoming out.
PH:5.97 when max co2, 7.23 before the co2 goes back on. Base PH of water after 24hr de-gas 7.49.
Co2 comes in via ceramic diffuser which is then placed directly under a powerhead. There is about 12x turnover, and good circular flow.
Co2 comes on 2 hours before lights on, and off 30 min before lights. BPS way to fast too count. Have a PH controller to check PH, don't use it for controlling Co2 as I have not been able to get stable co2 levels that way (drifting kh)
Yesterday morning I added KH2PO4 until my test read 5ppm (calibrated) and KNO3 to 50ppm (added a little too much, wanted about 30ppm). Measured No3,Fe, abnd PO4 this morning. PO4 0ppm. No3 25ppm.
Can the plants really be using this much PO4? Or does aqua soil absorb/take up PO4 as well?
How much should I keep dosing, seeing i'm having trouble with GSA? Just try to keep it at 2-3ppm with daily dosing maybe, but then I'm afraid the Fe will become unavailable?Ļ
Bump; May add my plants are growing ridiculously fast and pearling very well. I trimmed my plants, and 5-6 hours later I could barley see where I cut my Heteranthera zosterifolia, new small leafs already. Never had growth like this
Never used aqua soil and Co2 this high either though. It will be a challenge I guess, when I need to dial down the Co2 to about 30-40 ppm for livestock. I am also using 18lbs tank in about a month with current diffusion method, so gets kinda annoying to keep filling the tanks too. Just wanted to make sure the plants got a good start, and try to eliminate the co2 as the problem if things occurred, as it always seems to be the culprit.
Bump 2nd: Come to think off, since my plants are growing so fast, maybe I need to up my micros too? Seeing my AR is getting some twisted leafes (both AR "mini", and AR "Pink"), and 3-4 leafs on a stem or two on my hygrophila siamensis "53B". Not even close to the AR twisting though, which is more or less every stem. Any ideas would be appreciated.