I recently given a large tank that I would love to turn into a large vivarium. (We think it is 250 gallons) It is 5 1/2 feet long. My question is if I was to make it primarily for frogs (or toads) what would you recommend? Could I mix types? What would be the best types for a long tank? Are there any types of fish that would be ok to add? How many frogs would be ok? Any help appreciated, ty!