hello, i have a green tree frog in a ten gallon tank. i know it's not much room for many but i wanted to add one more frog. i was interested in the tiger legged monkey frog but am unsure if they are compatible with the green tree from temperment and enviornment wise. if not what other tree frog would you recommend for me? also i have a dirt substrate is that safe? i know not too get gravel but i was wondering if the dirt is okay. its chemical free, i got it in one of those blocks that you soak in water from the petstore.. thanks everyone!