MY SOFT CORAL(XENIAS JUST DIED IN ONE DAY FROM LOOKING HEALTHY TO DEAD My natrates are 20 p is 0 nitrites 0 calcium 380, I know its low I 've been adding calcium for 2 weeks now 2and three times a week. added buffer also.picked up rock with some of dead xenia on it and unger rock was an inch and half bubble .Could that have been whats killing my coral?![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)