So the past few months I've had 3 scollys die and 3 that are almost about to die. I've had acans die and blastoma too . But lately acans are doing good but still having problems with scollys. I'm trying to figure out whether it's my lights or water quality. So I did a little experiment. I baught a very healthy Lobo this weekend and placed it where I usually put scollys . On the sand bed left center of the tank. And it bleached and did the same exact thing the scollys do. They turn dark in the center by the mouth and loose tissue. Whats strange is everything else in the tank is doing well. Why does it affect these corals. I have a bowerbanki 4 inches away thats thriving. I just don't get it does anyone have any idea what can be happening here. I'll send pictures. It's a 65 gallon reef with a small hang on refugium. I run biopellets in a small reactor rowaphos in another small reactor and carbon. The seachem renew carbon. Flow is 2 ai Nero5s and two small koralias lights are the first gen ai hydra Vegas. These lights were made in 2013. Yes they need to be upgraded. Im definitely working on that. They run at 100% blues 5% green and red 15% white and 95% violet. This problem has to be eather lighting or water quality. I need help trying to figure out which one it is.