I added a plate coral I got from my LFS on Friday, and it wasn't looking well from then. My coral is definatly dead now, its all white and the polyps are disappearing. I acclimated it over 2 hours from the drip method, and got it into the tank right away. I noticed that it had a brown spot where it was chipped away a little. I was disappointed with myself not noticing before I bought the coral, but I had given it a good look, except it was hard to see since it was facing the opposite direction of the glass... Not sure if this was the main reason that killed it or not.
Here are my parameters, some I think could ahve been the problem. Nitrates < 5 , Phosphate 0, Ph. 8.2, Salinity 1.026 (possibly 1.027 since I need to do a top off and another water change), Calcium 440, Temperature 80-82 degrees (sometimes during day can reach 83 for a very short period, since I monitor it constantly I can bring it down quickly), Kh is 14. My lights are good (see signature) and from the light to my sand layer is about 17 inches.
The rest of my livestock is doing fine, but corals are different. I figure it was either my paramters or my lighting that caused its death, maybe even the injury it had but I wouldn't think it was the main reason. I also was considering my algae problem was a reason too, specifically the brown and the red bubble algae. Luckily I am getting ready to add baffles to my refugium and I am currently looking for an overflow, so this should help. I felt so bad, my first coral didn't last a week
