Montipora Issue

[arranms96]

Can someone help me figure out what is wrong with this Montipora? I have a few SPS frags and most of them seem ok but this one is slowly going white. I thought it may have been down to shading, but now I'm not sure.

Alk - 8.5
Calcium - 450 (was was around 500 a week ago and slowly bringing it down to 420ish)
Mag - 1400

I dont currently have test kits for nutrients as I ran out but last tests (Two weeks ago) Nitrate - 0.2 Phosphate - 0.03. My Salinity is currently a bit high at 36.4 (Apex Salinity Probe) , slowly coming back down to 35. I have already redipped it using RXPRO and there was no signs of pests.


I am running 2x Hydra H26 Over a Reefer 350 with the below schedule

Any ideas?

 

[Smarkow]

I agree this looks like shading. Light and chem looks good. Getting enough flow?

 

[blasterman]

Excessive shading. Not a very happy bubblegum. Ive found bubblegum and flames prefer nitrate over 5ppm as well.

 

[Rmckoy]

I’d point towards Low nitrates along with fluctuating cal , salinity

 

[Smarkow]

Sorry one last thought - APEX salinity (conductivity) probes are notrious for drift and interference. Please don’t make salinity decisions based solely on one. Do you have a refractometer you can confirm with?

 

[homer1475]

Are there polyps on the white part, but just white, or is it bare skeleton?