Seachem Laboratories

Seachem MultiTest - Reef Special

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MultiTest™ Reef Special

  • Combines the Phosphate, Silicate, and Iodine/Iodide kits
  • Multi-cavity plate for simultaneous testing of up to 6 tests at the same time
  • Includes reference for test validation
  • Saltwater and Reef


    This kit combines the Silicate, Phosphate, and Iodine/Iodide kits into one kit. MultiTest™ Reef Special performs over 75 tests and contains reference samples for validation.


    The silicate test measures silicates to less than 0.5 mg/L in marine or freshwater. This test measures soluble silicate and reports it as silicate concentration. To convert to silicon, multiply by 0.3.


    The phosphate test measures inorganic phosphate to less than 0.05 mg/L, producing a unique easy to read yellow-green-blue color range in marine and freshwater; however, usually, freshwater phosphate concentrations will be beyond the range of this kit, and dilutions of the sample with distilled water will be required.


    The iodine/iodide test offers a quantitative test for this important element of soft and hard coral growth. It measures iodine or iodide to less than 0.005 mg/L. The color scale peaks at 0.10 mg/L.


    75 Tests

    MultiTest™ Reef Special performs over 75 tests each of phosphate, silicate, and iodine/iodide

    And with the multi-cavity test plate, multiple tests can be run at the same time.



    Phosphate: 0–3 mg/L 
    Silicate: 0–25 mg/L
    Iodine/Iodide: 0–0.1 mg/L 


    Detectable changes on the color chart in the following increments:

    Phosphate: 0.001–0.1 mg/L 
    Silicate: 0.1–1 mg/L & 0.01–0.1 mg/L
    Iodine/Iodide: 0.0025–0.005 mg/L

    Reference Sample

    It isn't necessary to run a reference test to use this kit; however, its proper performance can be validated by running a test in the normal manner except that the reference sample is used in place of aquarium sample. You might choose to run a reference test if you have cause to believe the test is giving incorrect results. If you run a test using the reference sample and obtain the correct result (based on the known reference value provided) then you can safely be sure the test is giving accurate results.

    Color Chart

    All MultiTest™ test kits come with an easy-to-read color chart. It features a 5 cm viewing window to help isolate color and match as closely as possible to the test sample

    Opaque Multi-Cavity Test Plate

    All MultiTest™ test kits are read from an opaque white test plate. The sliding color chart along with the six-cavity test plate allows for easy reading and comparisons of several samples at the same time.

    MultiTest™ Reef Special Kit Contents

    • Silicate Reagent 1a
    • Silicate Reagent 1b
    • Silicate Reagent 2
    • Silicate Reagent 3
    • Silicate Reference
    • Stir Rod
    • Low Range Cuvette
    • Sample Pipette
    • Silicate Color Chart
    • Phosphate Reagent 1
    • Phosphate Reagent 2
    • Phosphate Reference
    • Stir Rod
    • Sample Pipette
    • Phosphate Color Chart
    • Iodide Reagent 1
    • Iodide Reagent 2
    • Iodide Reagent 2a
    • Iodide Reagent 2b
    • Iodide Reference
    • Stir Rod
    • Dispensing Pipette
    • Sample Pipette
    • Iodide Color Chart
    • Multi-Cavity Test Plates (3)
    • Phosphate Instructions
    • Silicate Instructions
    • Iodine/Iodide Instructions