Your best solution is to find the cause which is most likely PO4
. As far as animals, most will ignore long out of control algaes, they're simpley to much work to make a meal out of. Crop it manually being sure it's removed as you go. Most hermits and reef snails will consume the short stalks. The best animal by far is usually an urchin. IME
, the blue tuxedo is your best bet. Completely reef safe and will not strip corraline.