Also try testing your carbon for nitrates. Aparently some types of carbon can contain nitrate and release it into the water.

Okay we'll thanks everybody for the input. I am going to start taking the sand bed out slowly. And then i am going to see how that works and if not i think i will try the denitrator and see if that works. Hopefully that will work and that will be the end of it. If not i dunno. My confusa is pretty mush gone but the acroporas still look okay so i guess we will see what happens. If not i will just give up on sps and go with softies:)

Thanks again
Craig

I wil keep it updated anyways