Re: 12x12x18 - Help me visualize
Imis are great. If they are to breed and raise their young in there, they'll like as many broms as can fit (I try to put 4 Neos in each 12 x 12 x 18, and they use them all) and lots of leaf litter on the bottom.
Mini Pixie is a nice choice; mine stays really small (3 inches high, and doesn't spread much).
"People are like plants, they grow toward the light."
- Hope Jahren