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6 Inch Carbon Filter Odor Control Grow Tents Air Filtration and Hydroponics

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Dark brown spots on Rockwool

I am pretty new to hydroponics I have only tried this once before with great results. This time around I have noticed Dark brown spots on my Rockwool As well as green algae. Is this normal? I added hydrogen peroxide at 3 mL per gallon to my reservoir tonight seeings how I am going to do a rez change this weekend. Plants are five days into flower And looking good. Just worried that this may cause a problem in the future. Any help would be greatly appreciated. I have included photos of the...

Dark brown spots on Rockwool


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