Originally Posted by jwalsh
Why would the coraline on my snails be dying? My parameters street. Ph 7.8 ammonia 0 trites 0 and trates 15. The only thing different in my tank is I got a fixture finally and I added a few easy corals
Your Ph is a little low. Check your calcium and mag levels I suspect they are low also. They are the most important tests you can do on a reef tank.
What is probably causing the bleaching of your coralline is your new lights. Coralline needs some time to adjust just as a coral would do with new lights.