Hammer Deflated and Droopy

[science_mike]

I've had this hammer in a relatively new tank for the past 6 weeks. It has generally always seemed pretty happy. Noticed yesterday that all of the polyps were "deflated" and it seemed like it was drooping. All other corals in the tank seem fine. Any ideas what is going on?

Noticed Alk was a bit low at 6.5 ten days ago, I have slowly raised it with B-ionic to 8.0 over the past 10 days. Otherwise the water quality is fairly stable and numbers are all fairly 'standard':
Alk: 8

Ca: 400ppm

Phos: 0.10

Nitrate: 15ppm

Mag: 1300

SG: 1.024

Water temp: 78degF

pH: range from 7.8-8.2

PAR (near coral): 150ish

 

[Tinnerito]

I've had this hammer in a relatively new tank for the past 6 weeks. It has generally always seemed pretty happy. Noticed yesterday that all of the polyps were "deflated" and it seemed like it was drooping. All other corals in the tank seem fine. Any ideas what is going on?

Bump!

 

[Shirak]

Can't really see much other than looks like a lot of skeleton showing and not much flesh around the top under the polyps. So that looks concerning to me.

You mentioned alk being low but for how long? How often to you check? Salinity if correct is also low. Should be around 35ppt or 1.026sg Don't know if these would cause a decline over a period of 6 weeks.. maybe? Maybe nutrient issue? Flow looks fine in the video and light should be good if it's 150par