That sucks.

I had the same problem with the aiptasia in my sump but the peppermints worked for me. I put them in the refugium where it was the worst and screened off the section where my skimmer and return pump are so they couldn't get in there.

I didn't feed them anything so they had to eat the aiptasia. Once they were done I moved them to the display tank.

It's not a sure thing i guess.

As of today, I can only see one peppermint shrimp, $75 bucks worth of shrimp gone. Zapped by pumps.

Any other ideas besides Kalking the unwanted aptasia. I can see new ones... About ready to give up on this, none in the Display yet.

Any ideas?

Build one of those zappers. They work good. In the DYI section.