API Test Bottle Expiration Date Question

[Etcool]

About a month ago I ordered a API Saltwater Master Test Kit from Marine Depot.com. I have used it for a while now and I have always thought that my readings never changed all that much for pH and Nitrites. So I started to read that test kits have a life span so I went and looked at my bottles. The only painted on number that I can find is on the top of the bottles and it looks to say 2009... Please look at the picture and tell me if these really expired almost a year ago. Thanks for the help.

http://www.aquariumadvice.com/forums/attachment.php?attachmentid=23288&stc=1&d=1270787299

 

[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.

..

 

[Etcool]

Ahh ok thanks for the info. I was thinking that the last 4 numbers were the expiration date, but that is when it was manufactured. Good to know thanks again.

 

[mgamer20o0]

i had to email them to get the info.