do test kits expire?

[Jess.in.WI]

I have some test kits that are several years old... does that alter their results?

 

[fishnutham]

powder or liquid i know the powder has an expiry date but i used some ad got the same results as fresh stuff..

 

[beblondie]

Yes there should be an expiration date on the box or the bottles.Yes they can lead to inaccurate results-Anne

 

[RadleyMiller]

They are most likely innaccurate, my pH test was good from 5 years ago, but thats just bromomythol blue. I don't know about some of the other stuff that they use.

 

[fishmaven]

If they didn't decay over time there wouldn't be a expiration date on the box or bottle. Manufacturers don't want to give more info than they are required to do.

If there's no expiration date, don't buy it.

BTW, if you're using liquid agents and aren't shaking them before using it, it probably won't matter what the expiration date is, you won't get a reliable result.

 

[RadleyMiller]

If they didn't decay over time there wouldn't be a expiration date on the box or bottle. Manufacturers don't want to give more info than they are required to do.

If there's no expiration date, don't buy it.

BTW, if you're using liquid agents and aren't shaking them before using it, it probably won't matter what the expiration date is, you won't get a reliable result.

You got that right, now I shake mine every time I do a test.