I had an aiptasia bloom (10-15 of them) recently. After reading about many aiptasia-destroying techniques, I tried the kalkwasser method (since I already had kalkwasser powder at home). First, the concentrated kalkwasser solution: 1-2 tsp in small container (4-6 oz) of RO
or distilled. Use a syringe like you get with Joe's. (You can also get one at a good hardware store or boat supply store as the syringes can be used to inject epoxy.) Mix up your kalkwasser, draw it into your syringe, squirt a little right into the aiptasia. I've had 100% success with this method, and the kalkwasser is good for your tank, too. Good luck.