I love toads and was thinking of raising some American ones; however I realized that when they get full sized my 30" tank is probably going to feel pretty cramped to them, especially since there is a 6" "pond" at one end of it.

Is there a good Bufo species that stays relatively small? Like I said, there is a small pond, so if they are semi-aquatic that would probably work. The tank has a bunch of moss and small plants in it at the moment and I would like to keep it that way.

Thanks.