This is a very handy test kit that will accurately test everything except nitrate. Specifically, it tests nitrite, chlorine, hardness, pH, and alkalinity, and the results seem accurate compared to other brands' test results. I was suspicious of my nitrate test results and tested tap water, Brita filtered water and Aquafina bottled water. The nitrate results were off the chart for all samples. I checked with a different brand of kit and my suspicions were confirmed. All results were the same for different kits except for nitrate. I have a tetra kit but I will not be using it to test for nitrates. I would not recommend this product. My product was received fresh and has not expired for another 8 months.
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