Gabby- I had a cichlid get a very bad case of ich. He had jumped out of his tank and landed on the cold floor for who knows how long, I found him when I got home from work, and he was quite leathery and stiff. I always try putting my dried jerky fish back in the tank to see if the de-hydration is only topical, and perhaps the gills still had some moisture on them to enable them still be getting O2. Anyways, I threw this guy back in, he gave a couple twitches. I left him alone for a few hours and his buddies bit his tail clean off. He was laying on his side, but still breathing vigorously. I set this clear salsa bucket with small holes in it over him to protect him from the chomping of the other fish.
Anyways, he survived, but by about 2 days later, he had the worst looking case of ich i've ever seen. I didnt want it to spread to the other fish, so I netted the poor guy and threw him in the quarantine tank, forgetting that it was filled with natural sea water. He didnt look good at all in there. No swimming or splashing or playing in the current like cichlids love to do. Just slow breathing floating at the top. I figured it was because of the trama of being dried out, haveing your tail bitten clean off, and being covered head to toe in ich. So, my girlfriend gets home later that night and asks me why the cichlid is in the quarantine tank, and I tell her the story. Then she asks what I did with the sea water that was in the tank... hmm... Ohhh yeah, it is salt water in there...I had thought it had Cu+ water in it.
So, he had been in there for an easy 4-5 hrs, and he was still just floating motionless and breathing slowly. I pulled him out and put him back in his own tank under the bucket again. By morning, he didnt have a bit of ich on him, and he was biteing at the bucket, so I let him out. His buddies layed off him, his tail re-grew, and that fish never ever got ich again. Even when everyone else got ich from a winter power outage, he always stayed totally ich free.
I named him survior. He was killed many months later by my team of green spot puffers of doom.