So, I think my 20 gallon setup is about ready for a bit more stock. Currently I have 6 guppies in there, and looking to get something a bit different to go along with them. I'm kind of contemplating getting a dwarf gourami to add to the tank, but i'm seeing some information that has me questioning. For example, what is the adult size? (I have found some sites that say 4 inches, some say 2, I just want to make sure I know what I'm getting). Another thing I've come across is mention of some disease that the dwarf variety often have that can infect a whole tank rather quickly. Is this really that much of a concern? I'd really appreciate some input here. I've had blue gouramis in the past (when I was younger and not so careful, or knowledgable, about keeping an aquarium healthy), and the idea of having a dwarf gourami is kind of appealing.