Hi, first post. Please help!
I have three Beta Fish. I used to have a small seperated tank, and one large one. I cleaned them once a week and each time I would alternate which fish went into the larger tank (so they could each have a turn to stretch out).
Recently, I got a new tank. So now they each have their own bowl (which is basically like a goldfish bowl). Which I still clean about once a week.
I am a fairly novice fish owner, but I have had these guys for over a year now. I noticed one of them has a problem. I didn't think it was anything serious, until I started researching it. I think his dorsal fin is pretty much entirely deteriorated. I am pretty sure it's fin rot, which my other fish aren't showing any signs of.
Now his fin has been replaced with a small white lump on his back. It doesn't appear to bother him much. He still swims around. He still eats. I'm just worried. I feel really bad. I wish I had noticed it sooner.
Is there anything I can do to help him out?