I'm pretty sure it takes a good while for them to grow big from that size. If you are willing to upgrade to a bigger tank when it starts getting larger, I'd say go for it! Then you could probably house a diff species in the 12x12x18 after the move and a bit of experience under your belt

That dish was given to me by a friend, I looked it up on google though and saw that petsmart carries them PetSmart - All Living Things(r) Leaf Water Dish customer reviews - product reviews - read top consumer ratings