First of all hi, I am also new here and also a big fish aquarium enthusiast!

What sort of tanks do you currently have set up? I have fresh water, salt water and gold fish...a combined total of over 1100L! Anyway, I cant answer your question from experience as I am still in the lurking/researching phase but I have seen pictures of tree frogs (not sure of the specific variety, sorry) kept with things like tetras, but only about 5 (minimum schooling size). Frog species in relationship to required/safe water depth in relationship to potential for fish will need to be considered I guess. And of course...unfortunately, just because there is a picture floating around on the internet doesn't necessarily mean its a successful set up
Good luck!
