Anyone keep multiples in the same tank? I currently have an Alpheus armatus (curlique anemone pistol shrimp) living in the rockwork, and an Alpheus randalli (candy cane pistol shrimp) in a burrow with a yellow watchman goby and a firefish. My tank is a 75 gallon (48"x18" footprint). I also have a pair of aurora gobies, and was considering either adding a couple more candy cane pistols, or a tiger pistol. Is this a bad idea? Or do you think it'll be fine?