#13
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Do you happen to know the date it was manufactured?
Nutrafin tests rarely make it to their "good-until-one-year-after-manufactured-date" claim. I know I've had to throw out a nutrafin kit. It hadn't worked accurately since the day I opened it. That was a different kit than pH however. I'm not saying your kit is innacurate but it might be a good idea to test it against a substance with a known pH level just to be certain.
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