montipora dying


New member
My montipora is bleaching and dying. Should i try and cut off the bad part and save the good part? Tank is 55 gallon mixed reef. All other corals appear to be fine. I have other sps, LPS and softies. All seem healthy. Water parameters: temp 78, ph 8.2, ammonia .25, nitrites 0, nitrates 80, Calcium 420, alkalinity 9.0, phosphate 0. Any thoughts are appreciated