The Sentry I Open-Air system combines an adjustable air-draw venturi with the Sentry I Dry Pellet Chlorinator. The combination of aeration and chlorination creates a powerful oxidizer and sanitizer. The Sentry I Open-Air Systems come in three models that will treat: Iron Iron Bacteria Sulfur Sulfur decaying bacteria Black Manganese Algae Tannins Radon gas Methane gas Low output well low pH.

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