Mr. Fraggs Chloroquin Phosphate 10G Fish Ich/Fungus Aquarium Additive. Additional active ingredients: Potassium Chloride, Chlorine, Ammonia salts, Pine oil derivatives, and traces of crystalized magnesium. The instructions state: Not for human consumption. Mix 3 grams with one gallon of water, add 6 ounces of white vinegar, stir, place in tank, fill with sufficient water to raise the level to the top, let sit for 48-72 hours, rinse, wipe down and rinse again, let dry wipe with a damp cloth and rinse again before replacing original contents. I bought a 20 ounce jar about 2 years ago for $13.99. Currently offered on eBay $800 for a 10 gram envelope.
I have about 2/3 of a bottle left. Taking bids. Now we're using a professional fish tank cleaning service that comes here once every 5-6 weeks or so. Much easier, and I don't have to chase the fish with that small net. A referral from my dentist. This was my wife's first husband's tank. His hobby. She keeps it going but had me doing the cleaning. The kids like watching when she feeds baby guppies to the bigger fish in the tank. Little sadists getting their rocks off. Of course when one of the fish floats belly up to the surface I'm the one who has to flush him. Sometimes I tell the kids we should cook it and eat it, or at least offer it to the cat. They give me dirty looks. Meh, the cat is a picky eater.