I just treated my entire tank with copper power because last week i saw what looked like ich.Puffer stopped eating and was scratching.All of a sudden he started eating and coming out and no scratching.Well today he is eating and normal but started scratching again so i put about 3 ounces in my 75 gallon.I have a clown,scorpion and a foxface and i hope it's safe for all.My bottle didn't come with instructions so how long do i keep it in the tank.I don't have testers either.


