I have been treating my classroom fish Midnight for fin rot. He is in a hospital tank and I have been treating him with aquarium salt (1 tsp per gallon of de-chlorinated water).
A week ago, he looked like he was healing- fins had clear/whitish growth on them. I didn't change his water during a long weekend from school, when I came back to the classroom he had regressed and more severely.
I began treatment again, and now I have upped the AQ salt dosage to 2 tsp per gallon, whilst doing 100% water changes daily (except for this Sunday), when I came back today (Monday) his top tail fin was half missing and looked extremely shredded!
I have noticed him try to bite his tail last week and wonder if part of his missing fin is due to biting and fin rot?
I am going to take him home with me so that I can do 100% water changes without worrying about the weekends.
Any other suggestions would be appreciated!