Kinda pointless to keep adding to this thread when the OP hasn't been back to answer any questions. I still stand by my lighting theory. He said his parametars were fine. I guess my way has always been the KISS method. The thing that makes the most sense is his lighting. Based on what he had in there compared to what he switched to, that'd be like taking a newborn baby to the beach and setting them in the sun for 8 hours.
It is, but I was hoping he would post Alkalinity and Calcium. Most people will say that their parameters are "fine" when they do not test the two most important parameters in saltwater. My Nitrate, Nitrite and Ammonia tests are collecting dust. Only tested when something is out of line with Alkalinity and
Calcium. I test pH every so often just to verify my Alk and Calcium results. I just figured that asking him what his results were could spark some good conversation about this.
The increased lighting might cause more bleaching than anything else. You are supposed to ease the corals into new lighting, start with a couple hours, move to four hours, and then six finally to eight when they can handle it. I think that the lighting aspect is probably a contribution to his unhealthy coral, but I would still love to see some test results.