Done it to treat ich.. best treatment hands down. Just be careful doing it. Formalin and prazy are just as stressful, IMO
Only dip fish for 4min. Bring the FW temp and PH up to what the tank is at, and you'll be fine. But the big thing, ONLY 4 minutes. The only fish I lost doing this was one I forgot and was in it for 10min... rip little guy. I still fee bad about that one,