Hi, this is actually my first ever post. I recently bought a new tank, and purchased an M. auratus. My question is when does the male show its colors? Currently the fish is aprox. 1.5" long. Also I have what was told to me to be an Eletric blue hap, it is aproximately 1.5-2" long, the colors have yet to change. One more thing.... I have 2 electric yellows, 2 electric blues, and and 1 M. auratus, is this two much for a 29 gal. tank?