In my experience, after I put a flame angel in, all the aiptasia I noticed are gone. Coincidence? maybe but I'm glad I got rid of those aiptasia somehow
I was told a klines butterfly when I had an outbreak in my old tank. We added him in as well as 2 peppermints to a 24gal and it cleared up in a few days. The fish did more of the work the shrimp seemed worthless!