So I have Grape Algae( Caulerpa Racemosa)in my HOB refugium and a small piece broke off and got into my display. I didn't notice this as it must have gotten behind some of my rocks. Long story short, it has taken over my display and I can't seem to get rid of it. I try to manually pull it off the rocks but it has so many attachment points that it just breaks off where I grab it. Does anyone know of any fish that would take care of this or anything I can add that will knock it out?