First,
Is it ok to house different colors of dart frog in the same enclosure? for example housing a phyllobates terribilis with an azureus or aurates?

second,
How prone are dart frogs to getting diseases? Do i need to boil and sanitize everything i put in the vivarium?

Third,
How easy is it to get a pair of frogs to breed. Do they need a rain/cold cycle? or will they just breed if kept together normally?

Thanks