I had aptasia real bad about 1 year and half ago. Didnt really know what they were till it was way to late, nothing worked becuase there were so many 100++. They killed off all my zoos and plays. I got fustrated and negelected my tank. Cyano over ran it. So i clean the cyano off and restart the sytem after a couple of months and bang all the aptasia was dead because of the cyano. Sheer fustration cured my aptasia problem. Although the bubble algea came back. That is still an ongoing fight.