I have a small (about 5 gal), unheated tank currently housing 6 white clouds and a pile of live plants. I really want to put some non-fish critters in there but I am not sure what can live in these conditions. I am partial to African Dwarf Frogs but am starting to think I should give up on them, since I have had about 5 of them die in this tank. I am thinking it's just been too cold for them. I keep my apartment cool...indoor temp can drop to 60 overnight. (Would these temps kill ADFs? I have heard they're very hardy so if it isn't that, I am not sure what it is.) What other amphibians or invertebrates would work here? Ghost shrimp? Snails? Suggestions please!