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Measures the most important aquarium levels quickly and accurately.


  • Tests Calcium, Carbonate Hardness (KH), Phosphate, and Nitrate
  • Fast, easy, and accurate for precise test results
  • Compact to store at home

Follow API Easy Care Guide and use the REEF MASTER TEST KIT:

  • During Regular Care
  • When addressing Water Problem Solving issues


The REEF MASTER TEST KIT tests 4 key parameters to keep reef inhabitants healthy. The kit is highly accurate and economical, and includes 7 bottles of liquid test reagent, 2 computer-calibrated, laminated color cards, 4 glass test tubes with snap-tight caps, holding tray, as well as complete, step-by-step instruction booklet, including information on how to correct unsafe water conditions.

To view the Instructions Booklet online click here or select the “Instructions” tab above. 


Item #:              Size:      

402M                 7 bottle kit


Regular Care Water Problem Solving