how long are reagents good for?

[Mike Hunt]

Using TF100 test kit from last year i was getting CYA reading of around 40, when i ran out of reagents i had my water tested at Leslie's and got a CYA reading of 30. I ordered new reagents for the test kit and the first test with the reagents was CYA of 65.

All readings were within 5 days.

Should i assume 65 is the right number?

Did no draining of pool or added any cherms other than bleach.

 

[jblizzle]

The CYA reagents are inert, so should last a long time ... in fact most of the reagents "should" last a couple years if they are stored in a cool dark place.

{I have a 3 year old TF100, where all the tests still give basically the same results as my 3 month old TF100}

 

[Bama Rambler]

Yes, you should assume that it's whatever you tested it at.

 

[Speedo]

Forget the pool store result, was the lighting the same during both of your tests? Did you test in indirect sunlight..?