europas_ice
Aquarium Advice Regular
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.
..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.