Yo! I bought a pair yesterday for my 37 gallon. I have been told that they are very aggressive, I have yet to see this. Anywho, since they mostly hide in the caves I have provided, there doesn't seem to be a whole lot going on; so, I am wondering, what other fish would do well in with these guys?? BTW, I also have 2 spotted rafaels. The middle to top regions of the tank are the best for dither fish, so anybody who can live there will be fine!! Thanks!