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Re: Need some expert help with water experiment at elementaryschool



I worry about the tank being made of metal. If it is straight iron, it will probably be non-toxic, but it will rust. If it is galvanized, there will be danger of zinc poisoning. I would recommend painting the entire tank with at least two coats of marine epoxy paint.

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Paul Krombholz in muggy central Mississippi, where we had thundershowers yesterday evening.