Well it depends on what kind of algae that it may be, it most cases i would just let it go. My dwarf ceriths and my emerald crab go all between my zoas and clear the algae from between them on a regular basis. Maybe you may want to add a few more snails or get an emerald crab or 2. Can you maybe get a pic so we can make sure it is not a nuisance algae growing that you may want to manually remove from them?
Bobby
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