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Instructions - 2 steps only


Keep out of reach of children.
Attention: Before any use of the vial test or measuring scoop, make sure it is washed with RO water only and dry it up with a soft paper.


Results of Royal Phosphate professional fresh water test kit are in PPM.
Each kit will give you 100 tests.


2 steps only:

  1. Using the 5 ml syringe, add 5 ml of aquarium water to the test vial.
  2. Add to the test vial - 1 level scoop of PO4 - 1 reagent and swirl gently for 10 seconds.
  3. Add 5 drops of PO4-2 to the test vial and swirl gently for 10-20 seconds.
  4. Allow it to stand for 1 minute.
  5. Hold the test vial next to the supplied color chart on a part of the chart which is white and compare the colors looking from the side of the test vial. Read the corresponding phosphate content. An intermediate color corresponds to an intermediate phosphate content.


  • Keep your fish aquarium healthy and thriving by using Royal Nature advanced test kits. Testing your aquarium water's Phosphate levels regularly with our easy-to-use ROYAL PO4 PROFESSIONAL TEST is recommended. Testing water parameters on regular basis, helps prevent many invisible water problems that can be harmful to fish. When left without treatment, high Phosphate will lead to high concertation of the worst enemy of fish – PO4/PO3. An unwanted build-up of organic pollutants and poor fish health. Testing with Royal Nature Phosphate professional test kit is fast, easy, and accurate. The ROYAL PO4 PROFESSIONAL TEST for freshwater aquariums test for harmful Phosphate levels from 0-5 mg/L and easy to read color chart. contains 100 tests.

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