The only thing you can try is to add some hydrogen peroxide (H2O2) to the res and wash off the bad roots with good Ph adjusted water. Try to clean them out the best you can. You have nothing to loose at this point unless you are almost done with flower. A few times I have been lucky and able to wash off the scum and they have recovered.

Good luck
Zandor Reviewed by Zandor on . root rot question Hello, what can explain root rot in a bubbler system? I'm growing 4 plants ( same strain : WWxBB from female seeds ) and 2 are experiencing a low growth rate and the root system seems to have parts that are rotten. They have same amount of bubbles, same nutes, PH, ... And what to do in that case, to cure them? Thanks Fhydro Rating: 5