This special lid is designed to precisely fit Regal 300-S, Regal 300-INT, Regal 300-EXT, SRO-6000SSS, and SRO-6000EXT 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.