They would do better in pairs. They will like to have caves and sand to dig in, and they do best with small fish like the tailspot blenny, are ok with the yellow watchman goby, and need an environment free of larger fish that scare them. The better temperature is 26.6 C, and the salt should be 1.025. They will like the smallest pellet food and frozen mysis shrimp. They do NOT get along well with all pistol shrimp, and can be killed by them. Keep your alkalinity close to 8.3 and your ph at about 7.9-8.3.