Something is very seriously wrong with our Hannibal.
He is in a 3.5 gal tank. Water temp is 78*. He gets a weekly 50% water change and has a filter. He has 1 decoration and a live anubias (floating). His water tests normal and he is acting fine.
In less than 24 hours, his dorsal fin has gone from growing back to being 2 little ribbons of fin. His tail is also missing quite a bit and he has some missing on his anal fin now.
He does have a history of what I believe was most likely fin rot. When we bought him, most of his dorsal was gone down to his body along with a very small section of anal fin.
I have checked him with a flashlight to get a better look at him. This does not appear to be fin rot. It doesn't look like it. No blackened ends. No curling. None of the tips are red other their natural color and none are bloody. This is moving very quickly as just a few hours ago his dorsal was fine. I do not know what is going on with him. I can't figure it out.
I've grown quite attached to him and simply do not know what to do as nothing seems to be working against this.
Could be something else eating away his fins? Is it possible he has a tougher sort of fin rot that never really went away?
I'm sorry if this is a bit jumbled at all. I just don't want to loose him.