I am planning to start an african dwarf frog and/or fire bellied newts and/or fiddler crabs. All of which are at my LFS. I was wondering which, out of these three, could I put together? I was told I could put all three together and it should be okay, but I wanted to asked someone who was experienced first. I researched a lot of info on how to care for all three. So my question is out of african dwarf frogs, fire bellied newts, and fiddler crabs, which combinations could I have in my tank? Please list all possible combinations or just say all combinations if I can have all three occupy one tank. Thanks a bunch for anyone who can help!