diablo30xp

I have a 93 gal cube some sps and lps and softies...
my lights r radion g2 at 45% put it up higher the corals start to die.
I have 2 mp10s
1 wp 10 for circulation
cal 440
alk 9
mag at 1500
phospahtes at 5
nitrates at 0
tank is over 2 yrs old transferred everything from my 75 gal that I had for over four yrs and everything was growing and coloring fine. I dose my alk and cal with brs 1.1ml for 4 hrs. don't know y my sps and some zoas are ...