Berghia Nudibranches have worked best for me. It can take a little time, but it is nice to know that they will constantly be on the hunt for aiptasia, even the small ones in crevices and in back of rock work that you cannot see. I have never used f or x aiptasia products, but have found killing aiptasia one by one can be an uphill battle. Berghia feed on one thing and nothing else, aiptasia. Just cant have any Berghia predators in your tank, and strong flow can be a problem because they are tiny.
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