Whats happening to my corals?

[michika]

They transfered fine. The problems didn't start until about two or three weeks after the upgrade. I doubt its the angels, as the lemon peel I've had longer then I've had corals, and the signapore has never been seen to nip or even look at my corals.

In the old tank I had 400w on a 46g, and my corals thrived. The length and depth of the tank that I have now requires 2 400w to get sufficient lighting throughout the tank. I do plan acclamate my corals slowly to the new lighting.

This is the first time in well over a year that I've had coral loss for any reason. Its just such a mystery to me.

Any ideas on chemical causes?