Advice with this coral

[nuclearheli]

I have been trying to rescue this coral from bleaching and brown tips. Minor water adjustments and replacement in the tank. All other SPS corals are doing pretty good. I don't seem to have any issues in the tank with Cyano Seems like the coral is active but I cannot tell. Any help would be appreciated.

Conditions as of today:

90 Gallon
SG 1.025
Ca 460
Mg 1300+
Alk 9 - 10
Phosphates 0
N02 0 (best I can see)
NO3 A bit below 5 (color match is tough but no higher)
Ammonia 0
Copper 0
Potassium 380
2x 250W 20K, 2T5 Act

And the coral:

 

[Whisperer]

It's almost gone, the only living part is the at the lower left side of the photo. IMO, very slim chance it will bounce back but put is in moderate flow, I see that it is accumulating cyano. Porites are hard for me to keep.

 

[allsps40]

^ I agree. I would frag a small piece and dip it. Then out it in low light high flow to see if a frag will come back.