your PH is too high for a hydro setup.. you need to reduce your PH nutrient solution with some PH down.. 6.8 ought to do fine, but im told on firm assurance 6.2 is really where its at for hydro.

Hope this helps.. cause this explains a possible simple solution to your problem.

Remember, add a bit.. if it starts to recover.. add a bit more the next day or too.. not too much at once!! NOT TOO MUCH AT ONCE! :-)

I say that twice, because you don't want to seal your plants demise.. hehe

Have fun.

Peace,
Denial
denialisback Reviewed by denialisback on . yellowing leaves/stunted growth Please help. The pics are my 6wk old superskunk. deep water culture bubblers. 600w hps. general hydroponics flora series nutes. Cloning was fine. formulex and rhizotonic in rockwool cubes under fluro. About a wk after transplanting to the bubblers, yellowing of the larger fan leaves started. guy in hydro shop suspected heat stress, so i substituted my open reflector for a cool shade. Rating: 5