The coop near me sells potassium permanganate but I have to buy 5 lbs for $25.00, I really don't want to spend that much to clean the tank (and I don't want everything to turn purple, although I think purple is a nice color
). I also have live plants in the tank and I would hate to throw them out or kill them when cleaning with bleach.
Someone told me that hydrogen peroxide will kill everything including the beneficial bacteria in the filter. Is that true and if so could I run that through my tank?