I'm not trying to kill the algae, only the anaerobic bacteria. I read one link that says peroxide kills the black algae and is not so good on the green algae that my fish like to eat. I use it regularly on my septic tank and even brush my teeth with it. I noticed when I used it on the septic tank that it went from being clogged up to being almost spotless. I probably should do a water change but I'm going to give the peroxide a few days and see what it does. After I re read the article I decided to dump the whole quart of 3% peroxide in my 1800 gallon pool. I think I'm only at 5ppm. Being the pool is in full sun I don't think it will hurt my production of algae that much. I'll let you guys know what happens.
