Notice how most of these posts are looking for other remedies in the process?
Here is the thing with Aiptasia. They produce by what are called Petals that they "grow" around the base of them. In the event you squirt them, the aiptasia will shrivel up and cover up and protect the Petals. It will kill the Aiptasia, but the Petals will survive. Now only about 1 in 8 Aiptasia will have Petals. This is why, when the people that have Aiptasia squirt the thing, they occasionally have 14 more pop up around the area. USE PEPPERMINT shrimp. The one kind that will eat them, I forgot the name right now, WILL EAT THEM. I don't care what anyone says. You just cannot feed the shrimp for about a week and eventually they WILL eat the Aiptasia if you have the peppermint shrimp in large enough numbers. About 1 per 8-10 gallons is good.