Question.

[Bolisnide]

They have been together for about 2 years now. I know about not mixing the frogs but with all the reading I did it said the white lips and dumpys will be fine together. The other tank is 12 x 12 x 18 so that is gonna be for a couple small tree frogs.

AmyChris

I have never read that the two species are fine together, sorry.
the 12x12x18 is not large enough for 2 treefrogs, maybe one, and only temporarily.
Maybe check craigslist or classifieds for used aquariums or vivariums? Keep the 3 white's (dumpys) in the 18x18x24 and the 2 white lips in the 12x12x18, until you can get adequate room for all? That's what I would aim for....
I'm sorry I don't have the answer you're looking for
Good luck