The Dive Rite 2015 O2ptima scrubber canister may be loaded with either an Extendair® Cartridge (EAC) or you can self-pack the canister with approximately 2 kgs  of loose granular absorbent. 

The 2015 O2ptima canister is available as an easy plug-n-play direct replacement retrofit for existing O2ptima units. The 2015 canister is 1/2-inch longer than the previous cartridge only canister. The extra length is to allow space between the cartridge and the screen for granular plus a lip to retain the cartridge. The current O2ptima fabric cover fits but is tight on the new canister and Dive Rite is working on a more streamlined cover designed around the new canister.