Hi all. I am new here, and looking forward to discussions and learning from you all.

I just bought my first 2 red eyed tree frogs today, and have a few quick questions.

1) I have an 18x18x24 Exo Terra. How many frogs can I keep in there? I'd like to add 2 black eyed tree frogs. Can they exist with red eyeds? And is 4 frogs ok for that size of an enclosure?

2) Tonight when I peeked in on the frogs, I noticed one has turned a darker green color (and I notice a brown spot on its head). The other has stayed the bright green that they were earlier in the day. Is this normal?

3) How can I possibly sex them> They're both around the same size right now.

Thanks for any help you can offer...