H&G have alot of beneficial micro organisms even in the base nutes so no..do not use H2o2 with H&G use there roots excelorator all through clone veg and 3 weeks into flower. I use 4ml of hygrozyme per gallon after that. ...I wonder if you shop at Lonestar Hydroponics and Organics. =)Can you use h2o2 with House and Garden nutes?
H2O2 is considered caustic. 3% solution you can find all day in a pharmacy, the 35% you want has to be purchased locally, and there may be restrictions on it's purchase. You can buy 17.5% online and have it shipped to you. It is the strongest that can be sent through the US Mail. I use that and simply double up my droppers.Where can you buy higher percentage h2o2? I've looked around some, but don't see it really.