Soft Polyp Corals

[debiweb]

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?

 

[BlueCorn]

[moved]

 

[theop]

It could be your nitrates. 20 is too high for a reef tank.
What is your spec grav, pH, alk, and temp?

It certainly wasn't the calcium level or an air bubble.

 

[graveyardworm]

Your adding buffer, are you testing your alk, and ph? The problem could be ph fluctuations from adding buffer.