i started treatment for critter again because i'm thinking his fin rot has came back. after last nights post, today i noticed his tail was split. i'm pretty sure nipping didn't cause that. i also noticed that when he flares, only 1 of his gills comes out. his right one comes out a little, but barely. he acts totally fine though, still feisty, still eats normally, so i'm really confused. any help would be appreciated..should i get a different medication? i'm ready to tackle whatever this thing is.