API Freshwater Master Test Kit Expiration

[AwesomeMarioFan]

Hello,

I have an API test kit which expired 2-3 months ago. How accurate would the results from this kit be?

 

[fishwonder]

I am still using mine of 10 years ago. Bought a new one 6 months ago and they both compare perfectly with the same results.

 

[Delapool]

Might depend on storage, heat, how full bottle is, cap always on tight, etc.

I had an old nitrates test kit start to run out (still within expiry date). The new kit gave a slightly different reading by say 10 or 20ppm.