So my friend's betta fish is deathly sick to the point all he does is hide and not move. He doesn't eat either, which has raised his concern to whether or not his fish will survive or not.
He doesn't have the time to treat his fish so I volunteered to try and nurse his fish back to health, although I'm not very confident upon hearing some of the conditions.
So these are the symptoms I have gathered from my friend so far.
-Not moving or hiding in a cave/corner all the time.
-Very shallow breathing
He told me his fish doesn't look bloated and is not getting thinner. He doesn't see any outward changes other than the tattered fins.
I do know however that he did wait probably months to clean his tank properly and just managed to clean it lately (because he doesn't have time D:). So I don't doubt that something indeed is really wrong with his fish.
I've already ruled out that a salt bath is a must, but I was wondering if anyone could suggest to me any other possible treatment or even help diagnose what might be wrong with him.
Please help me ): I really love and care for my friend's fish because it's part of the reason I started keeping betta fish as pets. I don't want to see him die..