I purchased a kit maybe a year ago now. My testing of the clorine shows 5+ ppm. I test every 3 days of so once it gets warm. I take a bottle of water in to my local pool maintenance/supply to verify my tests. Today, they told me I was 1.5 ppm. I was confused. I went back home and used the Taylor K-1000 kit that I purchased from here along with the standard inclusive test kit and I read again 5+ ppm. I also used an older OXO kit I had and it showed real high.
I took another bottle or water in along with my test kit and explained my concern. He then used his Taylor professional drop kit and tested the water, showing 1.5 ppm. He used a strip test again also showing 1.5 ppm. I then showed him my test results with water I just brought in and he said the reagant must be old.
Could my reagant be bad already?