i have two clown loaches with ich, and i'm having a problem treating them. they are both currently in a salt bath, and have been there for three days, and nothing is happening. is it supposed to take this long to cure the fish? also, i need to treat the main tank, and i'm wondering if malachite green will affect a striped rapheal catfish? i know other cats are sensitive to medications, but i'm not sure about this one. do i need to remove him? some help with the loaches and catfish would be appreciated.