My little pet store Betta can be calculated to be about 5 years old now. He's basically had fin rot since the day I got him and it has always been a struggle keeping him healthy. Somehow, he may it through it all, and now I'm starting to wonder if this fish is invincible.
The past 6 months or so he has shut down completely, probably due to age or unknown illness. He doesn't swim around anymore, just lays on the bottom, on his side. Many times I have mistaken him for being dead, but he still breathes on. Every couple hours he will shoot to the top to get air.
He has a 10 gallon, heated, filtered tank, it's hard for him to make it to the top when he does shoot up, then he just floats right back down.
This blows my mind. I thought he was dying, but he's always still alive. He's always suffering. He hasn't eaten in 6 months! I wish I was making that up, but I'm not. I put the food in, he can't even move to eat it, and then I pick it up later, repeat. How can a fish that hasn't eaten this long still be living? The only thing I can think of is particles of the food somehow find their way to his gaping mouth. I know he hasn't eaten for sure, because I still see it there and get it out.
I can't bring myself to "put him to sleep", but I don't think there is any kind of cure for his problem. I'm at a loss what to do with my invincifish. He is suffering so much. Any advice would be appreciated.