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Old 02-19-2016, 10:43 PM   #1
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Api test kit

This may be a dumb question but, can an api test kit expire? Mine is about 2 years old and is reading 5-10 nitrates.. But I'm starting to get green hair algae on my sand?


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Old 02-19-2016, 11:45 PM   #2
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They can, but enough algae will give false readings as well.


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Old 02-20-2016, 01:10 AM   #3
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Mine has an expiry date of 2018 on it I think. Not all seem to have a date though.
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Old 02-20-2016, 10:00 PM   #4
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No I searched everywhere for an expiration date and no luck ... And alright thank you, I've been doing weekly 20% changes so I'll wait it out I guess ..


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Old 02-20-2016, 11:31 PM   #5
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I found the following on this or another site and saved it . Thanks to the original author.......

"Each reagent bottle has a Lot # printed
on the bottle. The last four digits are the month and year of
manufacture. Example: Lot # 28A0102. This is a pH reagent manufactured
in January of 2002. Pond Care Wide Range pH, Ammonia, High Range pH,
Nitrate, Phosphate, Copper, calcium and GH all last for three years.
Nitrite and KH will last for four years. Freshwater pH(low range) and
Pond Care Salt Level will last for five years. I would not trust these
kits after they have expired."
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Old 02-20-2016, 11:56 PM   #6
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Four years sounds about right for mine from when I got them to expiry date.
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