My male delta tail betta, Frankie, has dropped his color (went from a rusty red to more of a pinkish color in the body) and is bloated/swollen throughout his body (not just the belly). He still eats, but has stopped being very active. He lays on the bottom of the tank. He may have a very slight pineconing effect when viewed from above, but it is not obvious yet.
He is normally kept in a 2.5 gallon unfiltered tank with regular 100% water changes. It is heated to the high 70s. I use Stress Coat and aquarium salt. He is at least two years old (was full grown when I got him). I originally rescued him from PetCo because he was floating at the top of his bowl on his side and had fin rot. After at least a month, we got the swim bladder disorder under control, and then cured the fin rot. His fins never really recovered totally.
He is fed Hikari betta bio gold pellets. Sometimes he gets two in the morning and two at night, or three at once for the whole day. On water change days, he gets freeze dried worms.
It has been a few days now that he has spent most of his time laying on the bottom of the tank, but he is not a particularly active fish, so it didn't worry me too much right away. But this morning I noticed he was very bloated and has color loss, so I became concerned. I have moved him to a 1 gallon unfiltered tank with nothing in it but a heater and a fake plant for him to hide behind. I've turned the temp up to 84 degrees and added two teaspoons of Epsom salt. What else should I do?
He is just laying on the bottom half on his side :(
His color has come back somewhat. This is what he looked like this morning (though some of the color difference is because this morning's picture was taken with my cellphone and no flash):