Aiptasia are polyp-like creatures found in marine aquariums usually introduced with corals or live rock. They can harm corals by outcompeting them for space and food as well as looking unsightly.
This Aiptasia treatment is a contact solution to these unwanted organisms. Anti-Aiptasia will also work on the closely related Majano anemones. Anti-Aiptasia is pesticide-free and does not adversely affect water quality.