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I can't find this answer anywhere even though using h202 is discussed all over the place on forums. I was using a 35 gallon tote and couldn't stop algae even with using Hygrozyme, I figure it can only be b/c it wasn't light proof. I've now switched to bubble buckets and want to know how much 3%...

Ok I just noticed this last night, I got a plant about 15 days old that is developing black colorations on the edges of the leaf right at the tips where they're kind of jaggedy going up the side, it's only on the bottom set of leaves above the cotyledon and I don't think it's anything caused by...