I hate aiptasia. Treated my new tank like an operating room (almost three years old now). I'm almost positive that I introduced aiptasia with a turbo snail. It's been a battle ever since. I have clams and feather dusters and all types of corals. Finally, as a last resort, I got a small Matted Filefish. The first couple weeks I didn't notice it eat any aiptasia, just saw it eating bugs. It's been a month now and there is a large reduction of aiptasia. The fish has never nipped at anything - like clams or corals, yet. We're keeping a close eye on it.
It is very hard to add a new fish to this tank because of the Powder Blue. I really don't like any aggression in the reef and love this tank because there is zero aggression.
We absolutely love this fish. It gets along great with all the other fish and it is just so darn cute.