its been about 2 weeks since the reservoir was changed. I'll start filling up RO water tomorrow. It's going to take a really long time to get 40 gallons, the tank fills around a gallon an hour.

i didnt think about the nutrient uptake before, that makes perfect sense. so the more reservoir changes, the better. '

When i top off, in addition to the grow nutesshould I use the liquid karma and superthrive? Or just have those in the beginning when i fill the res?
Illusion Reviewed by Illusion on . Can't figure out what's wrong... 3 weeks from bagseed, 1" rockwool cubes (pH buffered) and hydroton, 8" net pots in five gallon buckets with bottoms cut out. Flood & Drain / Ebb & Flow, 40 gallon reservoir. (res temp 71 F) RH = 40% Growroom temp = 75-78 F 250watt HPS light, with two 48" Floro tubes as side lighting, and a CFL for good measure. Rating: 5