I was at Leslie's yesterday and took a sample of water to be tested to compare to my own test results. The store I go to had a new digital water tester. In about a minute they gave me precise results, i.e., CYA=28, CH=208 vs. the "rough" results I get with my tests. I had calculated my CYA to be about 30 and CH about 220. I was wondering if others have had any experience with these digital pool water measurements and if they are reliable. They certainly are more precise, but I'm not sure about reliability. They did not try to sell me anything based on the results. The store rep simply said your chemistry looks really good. Anyone have an opinion on whether these digital readouts can give more accurate measurements than I can get with my test kit? It was encouraging that they were very close to the results that I was getting on all measures. I usually have the most difficulty measuring CYA and CH, so it would be nice to get a "second opinion" from a pool store ocassionally.