For some info:
clicks have been coming forever, that I can recall, so assume that the clicks have been coming since inhabitants have been residing in tank
inhabitants:
fully grown cleaner (9months)
brittle star (9 months)
snails/hermits
all types of corals (LPS, softies, zoos, mushrooms xenia etc..)
damsel
pajama cardinal
pygmy angel
lots of live rock
no missing creatures so far I did have one wrasse dissapear, but it was pretty sickly and deformed!!!!!
Thanks for all the help