Thanks for the quick response!
I have a sailfin pleco, and he seems fine with the salt, but I'm watching him closely to see if his behaviour changes (and also for signs of ich).
Fancy Pants seems to be doing a little better today, but is still very sulky, lying on the ricks a lot, etc. But more of the ich spots are gone and the fin rot seems be slowing down. He still looks quite tattered!!
I can't believe how much his condition changed in a matter of four days, from very active with fins pretty and spread, to very tired with fins clamped.
How do I check the salinity percentage? And should I do an another water change when it looks like all ich spots are gone and the fin rot has stopped? Thanks so much for the help!