Lisa: Hope someone else chimes in...first thought is that you need to find why he is retaining so much water, and find a solution...not just wait for it to go away and soak less (but I'm no expert!). How often and for how long were you soaking? Even daily for 15 minutes for a hatchling should be fine, and in fact, recommended by many (although personally I don't like the forced soaks). I kinda doubt any sort of reasonable amount of soaking could cause that sort of swelling and the way the skin looks. Good job saying no to the vitamin injection. So you went to an emergency vet but have your appointment still Monday? Sounds good.
On TNT & calcium & UVB: I think with UVB and sun you never need to supplement D3. For my two year old tort I alternate days of pure calcium and TNT over the food. I don't think you can overdose on the TNT in any reasonable amount because its just natural ground up stuff. Depending on your tort's age would determine a recommended calcium amount, but this really varies person to person as we all have our opinions (not too much data out there...except that recentish post that now I can't find). If hes getting hours of sun almost daily, the MVB is probably overkill, so if you just wanted to go to a regular bulb to save the money (as long as the sun exposure is maintained), thats an option.
On TNT & calcium & UVB: I think with UVB and sun you never need to supplement D3. For my two year old tort I alternate days of pure calcium and TNT over the food. I don't think you can overdose on the TNT in any reasonable amount because its just natural ground up stuff. Depending on your tort's age would determine a recommended calcium amount, but this really varies person to person as we all have our opinions (not too much data out there...except that recentish post that now I can't find). If hes getting hours of sun almost daily, the MVB is probably overkill, so if you just wanted to go to a regular bulb to save the money (as long as the sun exposure is maintained), thats an option.