Hi, I have several polyps of Zoa on a large rock which grew from two polyps to many and did well. Just a day ago, hair algae took over and grew between and on several polyps which irritated them and are not opening now. I cannot remove the rock out of the aquarium for treatment. Scared to use tweezers due to fear of hurting the poly or getting poisoned. Anyway I can squirt something on them without hurting the rest of the corals ? Heard about h202 dip - so can I spray a diluted version of 12% hydrogen peroxide ? Appreciate any help.