I'm worried that moving him lots may stress him out even more. He's moving a lot and is aware of what is going on, so I'm thinking he has a good chance of beating it with temperature regulations (he's out of the sun now) and darkness. He's really beautiful... a lucky find. It'd be a shame if he stays ill..
He isn't rubbing, just perching. His breathing is normal too. I feel a lot of his weakness is loss of energy from zipping around his new home, due to our work schedules someone in the house is up at all times, and they let me know he was very active during most times. His fins started unclamping a little at the water change. When I put some salt in the water he came out of hiding and had a look, so the stable water temperature did help, although the instability helped me find the velvet early enough.