so no corals, no other inverts?
Edit:actually, i was thinking hyposalinity. i cant really remember but im fairly certain that even this has to be done in a qt. the only way to get rid of ich is get the host out of the tank, treat it, and starve the ich. im not the most expirenced on this topic. ive never had an encounter thank god. i know of 3 ways to treat it. copper medication (needs to be done in qt), hyposalinity (qt again), and just hope (not the best way).