their is nothing wrong with diving on air to 200fsw and using only your 120. those that say you must have helium in the mix are not what I would call real divers. our forefathers used it and that is good enough for me. also I know I am a safer diver becouse I have to concentrate on the task at hand. it is this 'paying greater attention to detail' that will bring me home every time. ed -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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