Bests & Worsts Reviews from Amazon

After posting the review below, I was contacted by Honeforest, the seller. They gave me some operating tips (that I probably ignored before!) and now the tester works great. So I changed the review from 1 star to 5 stars -- for a good product and a company that works to resolve issues. Even on a relatively inexpensive product like this. I would buy this again, if needed -- now that I know how it works!!! ******************************************************************************* Not sure about the accuracy of this tester. I measured two kinds of water -- tap and reverse osmosis. Got the same reading, and I don't think they should have read the same.