Ok First of all I have a 28 gallon nano cube hqi 4 months old. False perc clown and an orange watchman goby. There is a cave that the watchman is always in and i have never seen him do anything more than poke his head out. Is he mainly a nocturnal type of fish. he is very skittish. Just wondering if anyone else has observed a goby like this? any ideas on why he is not very active. Water params sg 1.025, Ph 8.2, no2 0 ppm, no3 2.5 ppm, nh3/nh4 0 ppm, alk normal range, calcium 420. temp 78-81