duck lips

Hi all, First post so if I break some rules here, I apologize for that. However I have been keeping fish for several years and like to think I'm not completely stupid. Anyways- I have a female Red festae (terror) that I have quarantined into a 15 gallon hospital tank for a duck lips...

Hello, I have a P. polleni that has been inactive and not eating for the past several days. His lips have been a bit white, but I chalked this up to him digging. Today I noticed they are quite swollen. He is about 3 years old, living alone in a 65 gallon. Nitrate is <5ppm right now and the...