Do water test strips expire?

In general, the industry standard is that water test strips expire in 2 years. In reality, it is exposure to moisture that causes them to "go bad." If you open up the test strips in a humid area with wet fingers every single day, they will expire faster, whereas if you open them in a dry area with dry fingers, they will last longer.

For more information, see our ammonia test strips and multi-test strips.