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Tetra EasyStrips 6-in-1 Test Strips
$9.92 (as of June 22, 2017, 2:44 am)
Results for chlorine, nitrate, nitrite, general hardness (GH), alkalinity (KH) and pH Reactions stop at 60 seconds; other brands keep developing, which can cause higher readings. With Tetra EasyStrips, It’s Now More Convenient to Test Your Water. More accurate hardness test. Reaction stops in 60 seconds to prevent false higher readings.