what do you suggest that i do? because i cant treat my tank with copper becasue of the rock and inverts that i have in there now.. and i have a small tank that i can use for QT, but i am no tsure i fi have afilter for that tank.. waht are some other suggestions on howto go about taking care of the one fish in my tank with ich? it's just one fish that is infected, not all of them..