@exclusiveX420,
I looked into the UC Roots stuff, and it looks like it is a different type of product than Hydroguard. Hydroguard puts beneficial microbes (why you don't want to use peroxide/H2O2 with it) in your solution that prevents negative microbes from causing root rot. It essentially chokes out bad microbes. I haven't had root rot bad enough to encounter what you have, but I know those are symptoms.
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