Potters Angel

[spikehs]

Just wondering what everyone thinks about a potters angel in my cube (18x18x18). Obviously bioload taken into consideration, do you think its to small for a dwarf angel? I was myself thought it might be slightly to small, been doing some research and can't find a consensus I have heard anywhere from 20-40gallons. I really don't want to get one if they would be cramped for space, but have seen a few and they look awsome.