So, I have had my viv set up for several months and have live plants in it. I had been trying to decide what type of frog to get, as I have never had one. I finally settled on a Green Tree Frog. It is very active and seems to like his new home. But I have a few questions and was hoping maybe someone on here may be able to help me out.

1. How do you sex a green tree frog?
2. How many green tree frogs can I house in a 10 gal viv?
3. Do green tree frogs call, and what does it sound like?

I would like to get a few more green tree frogs, but want to make sure this one settles in without any issues first. Plus, I want to make sure my 10 gal viv is big enough. If not, I guess it will just give me reason to get a bigger tank and try my hand at building a better enclosure. Any help would be greatly appreciated.