How to control mini brittle stars population ?

[Casey8]

I know they are good for your tank, just like the brittle worms as people say ... but I just don't like to have them in my tank. All my pods are long gone since these creatures have taken over my rocks, I haven't seen any pods left in my tank, and I blame these ones. It must be close to a thousand if I am not exaggerating here a bit ... they are everywhere. There are at least 10 of them for each single powerhead everytime I clean it. I can't kill them, so I always put them back in my refugium. I need something that will eat them naturally. I had been googling lately and some people say the harlequin shrimp will eat any stars. But I have one hitchhiking star I don't want to lose. It is about 3 inches, I don't know what kind it is but I like it. So, I can't have the harlequin shrimp.
I am desperate I need help here, I want my big fatty pods population back, these stars need to be out of my tank. I don't care how good they are, I just don't want them in my tank.