CO2 Scrubber Skimmer Lid 8″ (C2C-200)A Perfect Lid for a Perfect FitThis special lid is designed to precisely fit a range of Reef Octopus protein skimmers with the intent to use it in conjunction with aCO2 Scrubber (RO-C2T-90)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.Model NumberCompatible with Reef Octopus SkimmerRO-C2C-120Classic 110-S, Classic 110-INT, Classic 110-EXT, SRO-1000-INTRO-C2C-150Classic 150-S, Classic 152-S, Classic 150-INT, Classic 150-EXT, Regal 150-S, Regal 150-INT, Elite 150-S, Elite 150-INTRO-C2C-200Classic 202-S, Classic 200-INT, SRO-3000EXT, SRO-3000INT, Regal 200-S, Regal 200-INT, Regal 200-E, Elite 200-S, Elite 200-INTRO-C2C-250Regal 250-S, Regal 250INT, Regal 250EXT, SRO-5000INT, SRO-5000SSS, SRO-5000EXTRO-C2C-300Regal 300-S, Regal 300-INT, Regal 300-EXT, SRO-6000SSS, SRO-6000EXT