So after 2 weeks my 4 inch maxima clam was doing great. Today when I came home it was receded into the shell and looked a little shriveled. When I took him out of the tank he did not close. Does anyone think it might be dead. I immediately brought it to a friends house with a very established tank. Checked my parameters ph 8.2 ammonia 0 nitrite 0 not sure what's up.