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I grow hydro indoors, and I've never experienced root rot on my plants 'cause I use H2O2 in the reservoir water on a daily basis. I bought two one gallon jugs of 35% and use distilled water to bring it down to 6%. Stuff is great for disinfecting anything in the grow room. You gotta be careful with the 35% stuff. It'll mess up a good tan and frost your corneas in a heartbeat.If they continue to decline, I'll trim again and try washing the roots in hydrogen peroxide before replanting again.