A few days ago my gourami starting acting really weird! We noticed him in his prison tank just suddenly drop, and I mean drop (he wasn't swimming) to the bottom of his tank and lay there for a little bit. He then got up and swam around a little bit and seemed fine. A couple of hours later, he did the same thing but after laying motionless at the bottom for a little bit he suddenly started twisting and turning and swimming in tight spirals every which way, including upside down but only to his left like he couldn't straighten up to his right. We panicked and put him in a breeder (so he would keep dragging his head and body against the gravel and hurt himself) in our larger tank. Yes the temp were about the same and the water quality of the larger tank I had tested the day before was withing levels.
After some research, i thought it might be a swim bladder issue so I boiled up some peas, took off the skin, mashed the inside and put it in his breeder for him to eat. He never ate it, but started swimming right side up, though still bent to the left and occasionally dashing to his left in tight spirals (before he was swimming upside down against the bottom of the breeder sometimes barely moving at all).
He was fine for a few days so we released him into the main tank since we didn't think he would show aggression toward my platys or mollies since he was still just a little weak. Figured more swimming space might help him regain some energy.
A day after we released him he started just laying on his side or completely upside down again sometimes dragging himself across the gravel. We put him back in the breeder and gave him more peas, but he wouldn't eat them and somehow managed to jump out of the breeder and back into the main tank. We tried 2 more times to contain him in the breeder unsuccessfully (we felt we needed to because he has burn marks on his head where hes been scraping against the gravel) so we've given up on containing him and he lays at the bottom of the tank now.
I thought it might be hole-in-the-head but I don't know because its mostly where he scrapes himself on the gravel and its inflamed and starting to puff a little. Its also on the side of his face where he drags himself. I'm seriously considering euthenizing him because its been almost a week of this and I can't seem to find a solution. He won't eat, he can barely get himself up for air at the surface and it looks like he's only getting worse! I really don't want to, and I'd really love a solution but I don't want him to suffer needlessly. I'm gonna wait 2 more days to see if anyone can help, if he doesn't die before then.