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There are no more items in your cartJBL Testlab Marino11 Set test: pH 7.4 to 9.0; KH (2x); Ca; mg; Cu; NH4; NO2; NO3; PO4; O2. Sturdy plastic case with 6 water samples, two syringes, thermometer, ballpoint pen, and analysis logs instructions. Comparative laboratory system compares bleaching water.