I’ve had a reef tank for three years my water ok.but I still have a bit of algae in tank.the think I’m wanting to now I got a clam. It’s only small I got it from my supplier put in bottom of tank after letting it get use to water at first it open but my yellow angle pick at it and it close.?now it only open a small bit but the mantal only showing very little will it open or should the clam recover or not
