I got aiptasia in my 40 Breeder. Not bad. Few here and there less then a nickel size if that. But I won’t use medicine or anything like that. I would like to get a utilitarian animal… fish or shrimp. I have a leapard wrasse.. worried about adding such a small shrimp.. or I also heard a Australian Stripey, Microcanthus strigatus is also a good one and is one of the few fish that less likely to eat coral since 90% of my tank is LPS and softies.