by Louis Powell and Doc Vikingo
Unless you have reason for suspicion, CO in your tank should be no more concern than the cleanliness of a restaurant kitchen.
Carbon-monoxide contamination in scuba is a serious subject. Like nitratesin our drinking water, salmonella in our lettuce, and out-of-control drunken drivers, CO can kill unexpectedly. Yet few of us live in constant fear of these hazards...
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