I have very limited space in my 10 gallon cube. I wanted a utilitarian fish, something that stayed small, and something pretty. With my recent outbreak of ghost flatworms, a Springeri Damselfish made sense. I found a tiny little guy, baby 3/4" to 7/8" long. To say these guys are hardy is an understatement. I had to acclimate him from 1.012 water to 1.026, he didn't even miss a beat. Then within 5 minutes of being in the new tank he was already picking copepods and flatworms off the glass.