What Causes high calcium....?

[i am batman]

I'm curious if there are any natural causes for the calcium to rise extremely high in my cube. My levels are as follows:
Nitrates 0
Nitrites 0
Ph 8.4
Ammonia 0
Temp 80
CALCIUM 1000
I recenly had a heat outbreak, and some die off followed. Lost a couple corals, but nothing that would effect the bioload all that much.
Is it possible that the head caused this? I'm sorta lost. Thanks!

 

[alexknight]

Im not sure why it is so high but if your cal is at 1000 then you ALK should be pretty low if im right? try testing for it and if it is low raise it and your cal will go down.