Whats wrong with my Kenya tree

[Popeye]

Half of my Kenya tree is looking pretty sad. Any thoughts on what is wrong? And any ideas on what to do? Everything is normal for my water conditions and all other coral doing great!

 

[reef lover]

The algae and slime coats leads me to believe its not getting enough flow.

 

[Popeye]

I have two maxspect gyre 230 in a 55 gal. But maybe the good half is blocking the flow to the other half