Hydrogen peroxiced will increase ur root health if u have any rot or pythium from the larvae or bacteria...but what ever
That is true.. Bennies will also clean that up. Im not saying don't use peroxide. i just don't recommend to new growers..
I feel building good soil life with bennies and using biological controls like predator mites(which is what i use now for my fungus gnat problem) and biological funguses like Gnatrol is first step. peroxide is back up if all else fails.
fight nature with nature if that fails, do what MAN does best. step in with some chemicals.... and by the way hydrogen peroxide is very safe at diluted levels it is literally just hydrogen and oxygen..as it breaks down it releases oxygen into air and hydrogen back into water…. Do be cautious around anything with higher then 3% peroxide though...