This special lid is designed to precisely fit Reef Octopus Classic 150-S, Classic 152-S, Classic 150-INT, Classic 150-EXT, Regal 150-S, Regal 150-INT, Elite 150-S, and Elite 150-INT protein skimmers with the intent to use it in conjunction with a CO2 Scrubber (OCT-C2T90) to draw out the moisture from the skimmer and increases the longevity of the CO2-absorbing media. Users will experience a more direct and cost-effective way of controlling the pH in their aquarium.

Using this closed-loop system in managing pH will extend the longevity of the media compared to a non-closed-loop system. It can also be used as a lid for Ozone use when used in conjunction with a media reactor with granular activated carbon.