Hammer Staying Small

[Demoic]

My one green hammer on the left use to be opened quite a bit for a few months but recently has been staying small like in this picture. My Zoa's, (other hammer?) pictured, Sympodium, and Anemones are doing great though. Hoping someone might have a suggestion.

 

[JTP424]

Do your clowns like to rub against the thing? I have several hammers my clowns like to annoy, causes them to retract.

 

[Demoic]

Do your clowns like to rub against the thing? I have several hammers my clowns like to annoy, causes them to retract.

They did on the back one a lot. I wasn't able to watch it much over the past 11 days as I was on vacation but wasn't sure if there was something else other than that or if I should just them time.

 

[Shirak]

Looks like a noticeable amount of new white skeleton showing which is not a good sign. Possibly from irritation from the fish? Looks kinda shaded there too so maybe light? Or a combination of the two? What do you water parameters look like?

 

[Science/G]

Clownfish love them or hate them. They're probably going to kill that hammer. The only shot you have is to add some very benign coral like maybe a toadstool leather coral or something that they decide is a better place for them to hang out.