Toads like mud. It probably would not mind heat. Do you have part land and part water? I'd make the habitat as natural as you can. I have 4 FB frogs in a 10 gal tank with small water heater. They also have 60% water 40% land with plants, driftwood, treehouse, pebbles and smooth rocks, eco earth fiber substrate, and a small terra cotta pot for hiding. Do you have worms? These guys love to hide and burrow. They like live moss, too. Both frogs and toads like water. Hope this helps.