Hi everyone, this is my first post so if it's not quite in the style that everyone is used to! So here's my problem:
I have three goldfish, and I'm having problems with one of them. Shortly after getting my goldfish (almost two years ago), this one goldfish started to float. I immediately thought it was swimbladder, and have been trying every trick in the book to solve the problem. I've tried medications you put in the water, I've tried fasting the fish, I've tried feeding peas for a few days... but my fish still floats.
I then realised he only floats after he's eaten, and floats until he has a poo (which is covered in air bubbles or contains visible bubbles). The pellets I feed them float, and I began to wonder if he was gulping/swallowing air. I bought some sinking food and that SEEMED to solve the problem, he stopped floating soon after eating. But he was still floating for random hours at a time.
I started watching him like a hawk, and he gulps air at the surface. I have a filter and do daily partial water changes, so there SHOULDN'T be any oxygen level problems in the tank. I even bought some oxygenating tablets but they didn't help. He even gulps air immediately after a 100% water change. My other two goldfish never gulp air, and never have this floating problem.
So I guess my question is: does anyone know what is causing this? Has anyone else has a problem with their fish gulping air for no reason and floating about when it isn't swimbladder? Is there perhaps something wrong with his gill function?
I'm starting to get really quite upset about it- it can't be comfortable for him, and it's already be drawn out for almost two years. I'm starting to think if he can't be fixed soon it'd be easier to put him out of his miser
Any advice would be highly appreciated, I'm clueless!