Clowns hurting alveopora

[NotReefsafe]

My pair of ocellaris lownfish started hosting my alveopora about a month ago. Looks like the alveopora has had enough. Hasn't been fully opened in a while, and I'm worried it can't take much more abuse. I moved it to a different spot in hopes the clowns will lose interest. Any other suggestions? How would a BTA fare in my pretty packed 15g tank?

 

[ReefStable]

Unfortunately it is possible that they over do it with the alveopora. That said, I wouldn't risk adding a BTA. The anemone would likely sting/kill most other things in the tank.