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Hey, been growing with a top drip setup and have noticed a green slime building up in the rock wool median as well as around areas of my setup. What is it, why is it killing my plant, and how do I get rid of it? I've tried h2o2 and it seems to make the problem worse, please help.

Hey, I'm in my 3rd week of veg and I added 3% H2O2 (hydrogen peroxide) to my reservoir to kill some of the bacteria I noticed, as well as add some oxygen to the water. After adding I balanced the ph at 6.7, my super silver haze loves it around there. Cal n mag levels are normal, not sure what's...