I just got back from Ocean Gear in Huntington Beach, CA, this afternoon and want to give the local Orange County diving community an update on the carbon-free filling system at their new shop location. The Membrane System is tested, verified and running, and now pumps carbon-free (O2 clean) air upon request. That means they can fill any tank (Oxygen clean or not) from 21% to 40% Nitrox. All that is necessary is your Nitrox Card for Nitrox fills. Divers without their Nitrox card can still receive Hyper-clean air with their regular certification card. So, go by their new shop at 6836 Edinger Avenue and check out their comprehensive filling system. Their prices are more than reasonable.