READ THIS:Hydrogen Peroxide (H2O2)Hydrogen peroxide is an unstable molecule that naturally breaks down into water and oxygen. When you add it to a large body of water, that breakdown accelerates dramatically. In open water exposed to sunlight, it degrades within 30 to 60 minutes. It does not kill algae long term because it has no residual effect, meaning the moment it breaks down, there's nothing left to prevent algae or bacteria from returning. It's also a strong oxidizer but at the dilutions y