Help! I Have a 8" Derase Clam that has been closed for 2 days now, Its been in are 240Gallon tank for Several months now and was super healthy and happy. It just changed over night. We also have other clams in the tank. We tired doing a freashwater dip the other night and its still closed. I hope we dont lose it. Nitrates, KH, and the Calcium are good. Everything else in the tank is looking good. Any suggestions on what to do?

