I have had some bad outbrakes myself and have had to use everything from copper banded butterfly, pepermint shrimp and solutions that you apply onto the aptasia..
The solutions seem to kill the aptasia when you apply it, but then they come back kinda mutated so you have to apply a few times or use a big dose to kill them for good. It is an ok way to get rid of it but not the best.. use this if you have only a few aptasia to rid.. also I never had issues with any of the solutions I used. It never hurt anything in my tank and I have a mixed reef with many types of corals, clams and inverts
Using the copperbaded butterfly was the best way for me to rid the aptasia. My butterfly was awesome but took a little bit to start eatting the aptasia.. Lucky for me my butterfly would eat any food I put in the tank after I first got it to eat myisis ship.. After that it was a aptasia lawnmower! But once the aptasia was gone the butterfly would start to pick at some corals, no matter how much food I feed him he just had to graze and keep picking at my corals so he had to go..
Pepermint shrimp seem to just dissaper in my tank.. I have other shrimp in my tank so I know its not the water, but I think one of my fish eat them or something.. I just added 3 more to my tank today and they are allready gone or I just cant find them.
I would say try some store bought solution like aptasia X, joes juice, or stop aptasia if you only have a few aptais to deal with. If you have a lot then you need to get a copperbanded butterfly to rid them or use pepermint shrimp if you dont have hungry fish..