Update on my chorus frogs: I decided to go ahead and try putting them together, and they have been together for a few months now. They attack anything that moves, even if it's several times their size. Because of that they have tried to eat each other, many times but they never get stressed by each others attacks. Other than that they get along very well. They have been eating well and living happily in the ten gallon tank. I was also skeptical about the ten gallon being too small, but they seem to be thriving in it! Thank you for your reply and advice!