Whats up with my Hammer?

[x4FIR_1]

I've had it for a few weeks and its been looking pretty good and happy since. I got a lawn mower Blenny the 2 days and every day since it opens like normal and is out and puffy but around mid to late day it shrinks up. Could this be the blenny's doing although I haven't seen him go near it really. Nitrate and phos although a bit low and have been stable and I did a 10% water change yesterday. I also sold some zoas for credit when I got the Blenny but I run carbon so I don't think that has anything to do with it.

note also temp and salinity are stable

 

[Uncle99]

Any change in light intensity around that time?

 

[x4FIR_1]

Any change in light intensity around that time?

No, not that I'm aware of I work from home and its next to my desk so I'd see if anything was up. granted I'm not always watching if its the case of the Blenny bumping the coral or something.