I plan to start building an twenty gallon tank for dart frogs. What I want to get D. azureus. I would like in 5-6 years to build a 4' x 5' x 2' terrarium for frogs geckos and possibly vampire crabs. My plan is to learn all I can and get some experience with them over the next couple of years. What I want to know is would D. azureus be a good candidate for my final plan? And what gecko if any would be a good choice? Or what frog would not have any issues with cross breading or toxicity issues. And again I will be keeping them separately for a few years.