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[pwoller]

I bought 2 corals that both bleached out, one right away and the other a couple of days later. One was a staghorn coral and the other a grandulosa. At first I thought it was maybe somesort of hitch hicker so I did the lugos dip on them. Since that didnt work it got me thinking that maybe it was a water chemistry problem, although none of my other sps corals are dying. So here are the water chemistry stats:
78 degrees
SG 1.025
PH 8
Amminia 0
Calcium tested over 450 twice
nitrite .05
Nitrate 0
Alk 2.0
This was all done with a red sea testing kit. I rececently switched from Agramilk to Bionic as a buffer and calcium additive. Any thoughts on what could be the problem with these 2 corals or my water chemistry. Both of the corals came from the same tank and were added at the same time. Could the high calcium of shocked them? Anything else seem abnormal and what should I do about it. As of right now some of the starhorn is bone white and other parts still have a light green color to it.