Hey Woody...I have used H2O2 in the past, but as a way to promote a boost of O2, as well as a preventative against pests...I never had a problem with pests, but since discontinuing that practice, I haven't had pests either...so I can't say it's effective, but it doesn't hurt the plants as long as it is diluted...if memory serves, I think like a 1:10 ratio with water...Good Luck Bud!......cheerz...h00k...