Thanks for the advice. I boiled the rock that 2 of them were sitting on, and squirted the remaining 1 with vinegar. It's still retracted several hours later, so I hope it worked.
Rather than starting from scratch, I'm thinking to just watch for new ones for a good long time before putting anything else in. Is this a safe option? I don't know what the life cycle of aiptasia is like and would hate to see it pop up later after I put in corals.
Thanks,
Nevin
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