Precision saltwater master test kit simplifies essential routine testingAccurately measures pH, Alkalinity, Ammonia, Nitrite, and NitrateBudget-friendly for all saltwater aquarium hobbyists - beginner or expert-->OceanMaster saltwater master test kit makes saltwater testing easier than ever. This affordable and accurate master test kit is great for the beginning marine hobbyist as well as the experienced reef aquarist. Features fast-dissolving, foil-packed granular test chemicals (except liquid alkalinity titration test), and transparent color chip right next to the test chamber for easy reference. All color chips are calibrated to ensure reliable test results. OceanMaster Test Kit includes tests for pH, Alkalinity, Ammonia, Nitrite, and Nitrate. 20 tests each. Number of tests for Alkalinity varies by water hardness.pH Test - Range: 7.8 to 8.6Alkalinity Test (Routine or Precision test) - Range: 0 to 5.0 mEq/LAmmonia Test - Range: 0 to 0.8 milligrams/liter Ammonia-Nitrogen (NH3-N)Nitrite Test - Dual Range (high and low level readings): 0 to 1.0 and 0 to 10 milligrams/liter Nitrite-Nitrogen (NO-2-N)Nitrate Test - Range: 0 to 100 milligrams/liter Nitrate-Nitrogen (NO-3-N)Please click on "More Information" for directions for use.

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