Hammer not opening fully

[Cymonous]

I have had this hammer for about 10 months. I did change my powerhead to a wp-40 on low a couple months ago. All other corals are fine. It use to open up double this current size. Does it look like too much flow could be causing it to not open as much? Do I need to move it?

Edit: pic is sideways. Top is on the left.

 

[tony727]

What are your parameters?
You could try changing the flow before you move it to see how it does.

 

[tzylak]

Reduce the flow or muffle the output or reroute the flow and see what happens. If that does not open the hammer then there might be some other cause for its subdued behavior. Good luck.