I got this little guy on an impulse. Its been confirmed as a Asian Floating frog. I have read this care sheet Captive Care of the Asian Floating Frog

Now according to that sheet they need 16 sq inches each. I would like to go pick up two more from the store. However first I will be getting a proper terrarium. an 8x8x8 offers 64 sq inches of floor space. This would be a bit over the minimum and these terrariums do hold water.

would this be ok? they max at 2 inches. I may be able to get a 12x12x12 but with space limitations the less smaller terrarium the better.