extra 20L I can't decide what put in it

I was thinking about maybe some frogs since I don't have any or another type of gecko or Randy is wanting a garter again..

any other ideas? I'm open to anything except inverts

......I say go for some frogs.....something bigger like a mossy frog.......or you could do a mixed species vivaria and keep some reed frogs and some sort of arboreal gecko :D

I was thinking about cresties ... hmm I like that idea