Well, they seem to stay on other sides of the tank and rarely will they come in contact and fight. Like I said, it's a 10 gallon, I actually have no live sand in there, but I have about 15lbs of live rock plus I have 2 large musscles or clams (not photosynthetic) in there too. Amazingly I have a HUGE pod population in there, and I dont really feed the tank apart from small ammounts of food to the Mantis Shrimp.