Q:

Do pool chemicals expire?

A:

Quick Answer

Pool chemicals do not expire, although they become less effective if stored for long periods, according to Omni Pool Equipment. Some pool chemicals and test strips include a use-by date to indicate when the product is most effective.

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Full Answer

The reagents used to test pool water also become less effective with time. Reagents should be replaced if the bottle is stained or if it contains particles or a crust on the top, according to Taylor Technologies. Storing reagents in a refrigerator during the off-season may extend the liquid's shelf life. Pool chemicals should be stored in a cool, dry area with good ventilation.

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