There is another product that will help you aid with the removal of those pesky aiptasia that might sneak in via live rock or through other means. Aiptasia Free says that it can remove Aiptasia with the enclosed syringe. We aren’t sure how this product works, like Red Sea’s “tastes like cake” idea or if the solution is more like a glue like some other products on the market. Our theory with Aiptasia products: you never can have to many, add another to your list.  A bottle of the stuff retails for €12 ($18 -ish) and available in Europe.