The problem with joe's juice and kalk and other solutions is that you have to hit the aptasia several days in a row to completly eradicate those little *******s. If you have a deep tank it is a PIA to do.
Current project:
Get a huge medical style syringe of at least 10 to 20 or more mls.
Use a small amount of flexible airline tubing to attach this to a long hard airline tubing.
This way you have more maneuverability and better visibility when using the hardline tubing.
I'm grabbing a few large syringes at work tomorrow. Marde---I'll grab one for you just in case your interested.