Lol, you are right. Fine isn't a water parameter but I do read the stickies and I do make sure the parameters and temperature are correct before asking for advice but since you ask, ammonia is 0, nitrites are 0, nitrates are around 20, pH is 7.8, temp is 82 as stated (I swear it's soooo much easier to keep my water right with the sand substrate!!). They get a weekly vacuum which may remove around 10% of the water and a 50% change every two weeks. He gets a bloodworm or two if other fish are being conditioned just so I can use up the cube. Some weeks he gets them daily some weeks not at all. 10 Hikari pellets is actually fairly close to the size of his eye-probably just a pellet or two bigger. They are smaller pellets than BettaPro. Oh, no food on Sundays either just because I think it helps clean my piggies out. I forgot that.
I do test the water from his side but I also run the filter wide open-I can see particles drifting towards the filter side whenever I vacuum. It's also rated for a bigger tank. I'm fairly convinced the tank circulates well enough.
I have done the API general cure 2x now in the hospital tank but I have not fed him treated food. I'll pop in and see if the LFS carries the treated food. I think it has to be some sort of internal parasite not responding to just treating the water. I don't have any IAL. I had been waiting for the IBC store to open back up. Now that it's back open I'll get some ordered. I could boil up some dried oak leaves for him in the meantime.
I had completely forgot there even was treated food available. I bet that's what I need. Thanks!