Hammer coral wont open all the way.

[cdemoss01]

Hello all,
I have a hammer coral in my 65 tall right now and it is about half way closed up. All other corals including BTA are completely fine and are growing a lot. I cannot provide pictures at this time but I can soon anybody possibly know what this could be without pictures?

 

[shakacuz]

was it recently added to the tank? any critters that could potentially irritate it to close like shrimp, crabs, or fish? any changes in flow? is it being hit directly with flow? any other recent changes? water parameters? tank age?

 

[cdemoss01]

was it recently added to the tank? any critters that could potentially irritate it to close like shrimp, crabs, or fish? any changes in flow? is it being hit directly with flow? any other recent changes? water parameters? tank age?

The only thing I could think of would be the change in flow after I replaced my tidal filter pump. Although its not that much of a change in flow anyway. Nothing has been added. It is not being directly hit

 

[kevgib67]

Medium flow and light. Mine get unhappy before and during a split. Hopefully your getting a new head.