awesome thanks! Once I've got my whole system back on track and I sort out a better nitrate control system, I'm going to try that out as a regular maintenance item. 6 tablespoons is about 89 mL, so that's about 0.25ml/gallon per day. When you think about it, 89 mL of 3% in to a 350 gallon system is like diluting an already highly diluted solution another 15,000 times, and it's a compound that all eukaryotic cells have sophisticated enzymes in place to rapidly decompose. I bet at those concentrations it's not even directly killing the visible algae or the bacteria, but possibly oxidizing spores in the water column or destroying dissolved organics that wouldn't/haven't been picked up by your skimmer. If you've got even the tiniest bit of organics in your water, at that concentration it's probably completely decomposed before any of it reaches your rocks.
PS, where do you buy 30% H2O2? I thought only laboratories could get it that concentrated?
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