56g. 30"w x 24"t x 18"d. It has probably 12-15g of water, so I can get about 8 fish for it. When the mosses and other plants grow in, I'll get some dendrobates leucomelas for it. It only has a few orchids, and from what I hear, I'll be changing them out frequently until I find stuff that will grow well in it. The water is murky because I'm still cycling it.