I recently bought a squamosa (last week) and it acclimated well and has been open everyday, seemingly happy. It simply shut itself late today and has not reopened. I am not sure if it coinsided with the lights going off or not. The other clams in the tank are the same as they always are (a max and crocea) -- never had a squamosa, so not sure if I have a potential problem or not -- help would be appreciated