I’m currently having a problem with one of my bettas who always seems to have something wrong with him. I’ve had him from about August, and since then he’s had one of his gills get stuck out after flaring, his tail melt right down (he's a crowntail) and various odd grey patches that disappear within hours of appearing.
However, right now, I’m thinking there’s some problem with his swim bladder. His spine is kinked and he sort of sinks tail first if he stops swimming. I tried feeding him a pea and some daphnia and then fasting him, but his stomach doesn’t remain distended (he’s obviously passing something) and I don’t think it is due to constipation. He’s currently sharing a 6 gallon tank with one of my other males, and I make sure to change out 90-100% of the water every two-three days.
The other male shows no sign of illness, and both of them have a healthy appetite. He still swims out, albeit rather uncomfortably, when he sees me, but it makes me feel a bit sick to watch. I have lowered the water level and he has several shallow areas where he can rest without needing to go up for air.
I read online that an Epsom salt bath can sometimes help in cases like these, and I was just wondering if a) this was true, and b) what kind of ratio of water to salt would I be looking at? I will more than likely be moving him into a smaller hospital tank if the addition of one more heater doesn't explode our fuse box.
I can also try and get pictures if it will help
Oh and his tail has since grown back. It seems we have something in our water that melts them, even when I add blackwater extract, tannins from driftwood and keep the water meticulously clean.