Single White Polyp on Snowcone Acro

[Haubfather07]

Have a few Acro, but mostly LPS. Water is good, everything looks happy including the Snowcone. Just a single white polyp that looks out of place to me. I don't have a ton of experience so be gentle. ;Shamefullyembarrased Tested perimeters a couple times this week looking for anything to be causing it, both were almost identical and listed below. In case it matters, my Duncan hasn't been super happy for about a week now, but does that from time to time it seems and bounces right back. Included a pic of it as well just in case it helps. Tank has a super light bio load (only 5 small fish) and a smallish clean up crew as well. Light coral load as well, 6 SPS of different variations (only two of which are Acros all of which are frags). 5 LPS of different variations (mostly frags). I have three Kessil A360W that run about 9 hours a day but max at 60% intensity and for about 3 hours of that are at their lowest intensity. Plenty of flow, I run activated carbon 24/7 with a dash of GFO as needed (and currently). Any other details I can give just ask!

Thanks all in advance for your help!

Tank details:
116 gal total (RSR 450)
10-15% water changes every other week.
dKH - 9
NO3 - 1-2
PO4 - .05 - .1
Temp - 77.6-78.4
Calcium - ~420
Mag - ~1300
PH - 8 - 8.15

 

[sfin52]

Your Duncan looks miserable. Don't know a lot about sps.