LaMotte Borate Test Strips

[feetr2c]

How long is the shelf life on these? Once a pool is at 50 ppm, then in theory it wouldn't need to be tested again till opening next season. Unless the obvious like a bad leak, or 5 inches of rain in a storm etc.

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[JasonLion]

It has to do with how much humidity gets into the container. If they are well sealed and dry they can last two or three years. If they get damp they are ruined.