lps chalice

I started a thread a few days ago and it didn't seem to really get many responses. I will post the link below for the thread. My Hollywood stunner is turning white and I'm not sure why. Everything else is doing well. 4 x 54w T5s (6 month old bulbs) 79.5 degrees Salinity: 1.023 Phosphates: 1...

Got this coral off a friend and he doesnt remember the name of it. Looks like a chalice to me but the mouth is bigger than the ones on my other chalice. Maybe a Acan or something. let me know what ya think thanks