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This kit contains the necessary materials to conduct two tests each for iron content ( in ppm ), the hardness ( in grains per gallon ).
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This kit contains the necessary materials to conduct multiple tests of the hardness ( in grains per gallon ) of the water.
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This kit contains the necessary materials to conduct multiple tests of the hardness ( in grains per gallon ) of the water.
AND 50 test of IRON Levels and multiple pH tests.
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