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Old 03-10-2020, 08:28 PM   #1
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API Freshwater Master Test Kit Expiration

Hello,

I have an API test kit which expired 2-3 months ago. How accurate would the results from this kit be?
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Old 03-11-2020, 08:15 AM   #2
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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.
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Old 03-11-2020, 07:41 PM   #3
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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.
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