the tank remains steady at around 72-74 degrees. I do not have a filter or anything aquarium-like that could affect temperature and/or water quality (other than the tads themselves). I also have another smaller tank for the 2 tads who didn't have hind legs (but now 1 does) and they are still eating, just not as enthusiastically as yesterday.

I can take a sample to petsmart tomorrow to check water quality...