What's killing my coral?

[LBReefer]

My monti went from unbelievable growth to this in less than a week. There's another piece elsewhere in the tank and it's doing just fine. I'm thinking that there's some coral warfare going on.

Here's my parameters:

Dkh 6.9
CA 468
NO3 0
PO 0
NACL 36
Ph 8.4
MG 1600

 

[Hella_Reef]

My monti went from unbelievable growth to this in less than a week. There's another piece elsewhere in the tank and it's doing just fine. I'm thinking that there's some coral warfare going on.

Here's my parameters:

Dkh 6.9
CA 468
NO3 0
PO 0
NACL 36
Ph 8.4
MG 1600

Raise ur po4. Ur starving ur corals. Dkh is a little low too.

 

[bobby.w.hodges]

Also need nitrate. Discontinue what ever method you are using to remove nutrients until they come up. Turn off skimmer, gfo offline.....