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THAILAND | Sat, 10 Mar 2012 | By pmok | Views [496]
Many divers I met recommended taking the course and getting certified in Nitrox diving. Nitrox is the commonly used term for enriched air, or air that has more oxygen added so it's above 21%, and thus less nitrogen. For recreational divers, we could ... Read more >
Tags: koh tao, nitrox