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FYI, you can breathe the tank with a penny in it. I wouldn't do it to a tank that was O2 cleaned. -most of the time they don't even catch it until later in the middle of the dive.
Just as a sidetrack, I wonder if a penny could cause any sort of chemical reaction inside the tank and cause someone to get sick if they didn't catch it right away? Maybe not so much the new ones, but possibly the older ones with copper? Seems like a good way to introduce unnecessary liability to me.
in an enriched oxygen tank, perhaps. but I think it's take a while to corrode that much.
Well, we could ask Randy, the penny has been in his tanks for nearly 6 months now. Randy, if you care to show that you know me, any ill effects of that penny? Hehe.
And he dives every weekend.
Speaking of tank pranks - a fellow diver was taking a AL30 to have it viz'd. Before he took it into the shop, he opened it and put a red thong in the tank. It was priceless seeing the tech's face when he pulled them out of the tank.
Randy's just afraid that if he brings the tank out, that you'll keep the penny!