I've got a little idea, but i am fuzzy on the chemistry of it. Will gluteraldahyde (Or excel) be oxidized by H202? I don't have much algae but i cant get shrimp to remove the tiny strands in between my plants. Obviously some slight breakdown of organics or something is leaching just enough NH4 for the algae to establish itself. I want to hit the tank with H2o2 to oxidize whatever organic decomposition is causing the problem, then use excel to kill it and keep it from coming back. WOuld doing this reverse be better? Killing it then oxidizing it? Anyone with input? I have yet to take biochemistry so anyone with some background help would be great.