I checked all my param. and they are all good, my lights are nova extreme pro, it is at the mid to top of my tank with moderate to high flow, it has been in my tank since friday.. I have a torch coral, and doughnut coral that are doin great, and I have 2 corals that I found in my LFS live rock tank and he gave them to me for free if I could regenerate them and they are doin superb. any ideas? oh and thank you for the warmin welcome this site and forum is awesome.