1) How many days has he been in the Epsom salt now?
Started treatment on Sept. 3
2) He had fin rot. Is that gone now? (It doesn't sound like you used any medication, is that correct?)
It's pretty much gone. His fins have the new white growth where the fin rot was
3) He's not bloated. He's been eating (but had a bit less yesterday). Is that correct?
From what I can tell he is not bloated. I'm about to feed him soon so we will see how much he eats
4) Is he having trouble swimming still? Or just staying upright when he rests? (It sounds like he has better control over his buoyancy now though. Correct?)
I have not seen him go head up tail down in a few days. But when he stops swimming he starts to fall over. He has seldom gone up to his log in the past few days. Can't tell if something is still wrong or if he is sulking
It doesn't sound to me like he's having a parasitical issue. Since he had fin rot, it's possible there's something bacterial going on though.
I have some Tetracycline on hand from before. I used it the first time back in March when he got fin rot the very first time
If he's happier in the big tank, you could try putting him back in there to see how he reacts. (If needed, just move him back to the QT tank.) Could you put him in the big tank, with a slightly lowered water level? This would allow him to go back home, but he could reach the surface more easily.
Yes, I can lower the water level and watch him. I will feed first then move so that I can be sure he has eaten something just in case he gets stressed. Not to mention I redid his tank so I am not sure how he is going to react.
Also, you can put plastic food wrap (Saran/Glad wrap) over the top of the tank. This will increase the humidity level, and make it easier for him to breathe. This often has a calming/soothing effect, too. Be sure to leave several inches of air for him to breathe though!
I have a lid and it keeps the moisture in pretty well. Everytime I open the feeding door or remove the lid there is always condensation that runs off.
Do you have access to mosquito larvae? If so, rinse off several with a little tank water, and feed them to him. (I use a turkey baster to suck them up.)
I may have some standing water out bac. Never tried to cultivate the larvae but I will give it a go.