Hi everyone! I'm a (semi)new frog owner and I'm trying to expand my froggie family. I have had 5 whites dumpy tree frogs for a little under a year now and just recently I heard of communal tanks where there are a couple of different species in one tank. I heard this is possible (though the sources are questionable) and I was wondering if y'all can answer my questions.

Question 1: Is it even possible?? I'm sure if I had a 100 gallon tank, anything is possible. Mine is 18x18x36.

Question 2: If it is possible, what species will co-mingle with my little dumpys?

Question 3: Would the species tomato frog, green tree frog, or chubby frog work with them?
-Sub question: ARE TOMATO FROGS POISONOUS??? Half of the internet says yes, the other half says no.

Finally, would any of the afformentioned species make a good pet in general? I have an empty tank lying around and I wouldn't mind putting it to use. But nothing too loud like a pacman or a pixie frog.

THANK YOU IN ADVANCE!