is old test kit still good?

[europas_ice]

Do these NH3/NO2/NO3 testing kits go bad? I guess mine is 5 years old or so, and I'm trying to start a new tank, and I'm wondering if I have to buy new chemicals.

 

[mgamer20o0]

what kind of test kit?

 

[europas_ice]

AP Master Test Kit

 

[mgamer20o0]

In response to your question, 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.

..

 

[europas_ice]

Thanks, I guess I'll get a new one.

 

[HUKIT]

I have an old API kit that has been expired by 4 years and for giggles I ran each test 3 times comparing the new to the old and each test was identical. I wouldn't count on it but it was the same none the less.

 

[mgamer20o0]

like food you can still eat after it expires. a good idea maybe would be to try adding more ammonia nitrate to see if they changes anything.