Benchmarking a possibly-expired test kit

[FormerBromineUser]

Hahaha!!! Sorry about that!

I am hoping that CarlD will jump in here, as it's his method, but your math is certainly correct. Fresh water would be water without chlorine. (Some municipalities add FC and/or CC to their water.) I would think that your well-water would be fine for testing although I would avoid the softener because of the NaCl (Sodium chloride....)

According to what I have read on the Taylor site, the pH and alkalinity reagents should be good for quite a while if you've kept them cool and dark. (I said before over the winter, but that also goes for the swim season too.) Here's Taylor's guide to checking your chemicals and although you don't have many of these reagents, others reading this might: http://www.taylortechnologies.com/Ch...SP?ContentID=2

A K2006 WILL last several years, 10 might be stretching it, although I have heard people who say they've done it. The thing that I question with those claims is that sooner or later you are going to use up a bottle and have to order more. That just resets part of the clock..... Mine is several years old and I have replaced these reagents due only to use, not "going bad": FAS-DPD powder (0870), titrating reagent (0871), pH indicator (0004), and CYA reagent (0013). The rest are still going strong!

[Whetstone613]

Here's my story:
I took 0.25mL of bleach, from what I mentioned is labelled "14 302 19:10 A4 K1", from an eye dropper, added it to 2.5L of water from my dehumidifier and mixed it thoroughly. Then when I tested it, the FC came to 1ppm. The TC was a little hard to tell, because it was a different colour, but it was as least as dark as 3ppm. So what does that mean?