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Red Sea Alkalinity Pro Test Kit
Red Sea Alkalinity Pro Test Kit
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* Choose the easier way to measure reef aquarium alkalinity (buffer)
* Innovative new alkalinity titration test you can use with one hand
* Test alkalinity levels in coral reef aquariums with greater ease

Achieve accurate alkalinity titration test results with just one hand! The innovative Red Sea Alkalinity Pro Test Kit lets you enjoy hassle-free titration (color change) testing. Thanks to a clever patent-pending single hand titrator, cumbersome titration testing is now simpler than ever. Say goodbye to the old-fashion method of adding and mixing a titrant with sample water containing reagents.

Red Sea Alkalinity Pro Test Kit boasts a new level of convenience for reef aquarium hobbyists. Routine and precise measurement of aquarium alkalinity (buffer) levels is essential for successful coral reef aquariums. This advanced alkalinity titration test kit encourages proper testing skills with ease-of-use and a high degree of accuracy (±0.025meq/l - 0.07dKH).

Included quick guide card walks you through the testing process with simple, easy-to-understand illustrations. Reverse features a chart that displays alkalinity test results in meq/l (milli-equivalents per liter) and in dKH (degrees of Carbonate Hardness). Measure and monitor alkalinity levels with Red Sea Alkalinity Pro Test Kit to ensure ideal water parameters for coral reef aquariums housing SPS, LPS and Soft Corals. 75 Tests, accuracy of ±0.025meq/l - 0.07dKH.

Includes a 100ml Sample of Red Sea Reef Foundation B, a carbonate and buffer complex for balanced formation of coral skeleton.


  • Titrator
  • Instruction Manual
  • Color Card
  • Syringe 10ml
  • Titrant - 75ml
  • 100ml Sample of Reef Foundation B

Directions for KH Alkalinity Pro Test Kit

  1. Using the large syringe provided, place exactly 10 ml of the water to be tested into the glass vial.
  2. Screw the glass vial onto the bottom of the Titrator.
  3. Ensure that the dispensing tip is on the 1 ml titration syringe and fill with 1ml of Alkalinity Pro Titrant. (See note for filling titration syringe.)
  4. Insert the syringe into the center of the Titrator so that the volumetric scale on the side of the syringe is visible. The graduations of the volumetric scale are 0.01 ml, equivalent to an alkalinity of 0.05 meq/L (0.14 dKH).
  5. Add the first 0.4 ml of titrant (equivalent to an alkalinity of 2.0 meq/L - 5.6 dKH) by pressing the plunger of the syringe while gently swirling the Titrator. The test sample will obtain the titration start color as shown on the instruction card after the first few drops of titrant are added. Continue adding the titrant gradually, swirling the Titrator after each addition and paying attention to the color in the vial. As the color in the vial approaches the end color as shown on the instruction card, add one drop at a time, swirling after each drop, until the end color is achieved. Note: If you have added 1 ml of alkalinity titrant, without reaching the end color, the alkalinity of your water sample is greater than 5 meq/L (14 dKH). Refill the syringe and continue to add titrant until you reach the end color.
  6. Note the amount of titrant used (according to the initial and final position of the plunger not the liquid surface) and use the table on the instruction card to calculate the level of alkalinity in the water sample.
  7. Dispose of any unused quantity of titrant.

General Information
The Foundation Elements (Ca, KH & Mg)
A successful coral reef aquarium is dependent upon maintaining the appropriate water parameters that in turn provide the stable environment required by the corals. Although all the elements found in natural seawater have an important role in providing the optimal water parameters, a few of them have a more significant role in the overall stability. These elements are the foundation of the reef environment and they include the three major elements, Calcium (Ca), Magnesium (Mg) and Bi-Carbonates (HCO3). These three elements have a major effect on the water chemistry (pH stability, Alkalinity and seawater ionic strength) and on many of the coral's biological processes (skeleton formation, ion exchange and photosynthesis).

Red Sea Reef Care Program
General Instructions for Testing and Supplementing

  • Before carrying out any water testing, always check the salinity and make adjustments as necessary. If you have made adjustments to the water, wait 10 minutes for the water parameters to stabilize. (E.g. 1 ppt increase in salinity due to evaporation of freshwater will result in approximate increases of 13ppm Ca and 40ppm Mg).
  • Test only with high resolution test kits such as Red Sea's Foundation Program (Calcium, Alkalinity & Magnesium) Pro Titration Kits.
  • All of the Red Sea Reef Care Program supplements have dosing charts (on back of product) based on treating 100 liters / 25 gallons of water. Estimate your total volume of water (aquarium & sump less volume of live rocks etc) to calculate the correct dosage for your system.
  • Supplements should be added to the sump. If you do not have a sump, add the supplements slowly to an area with high water flow to prevent direct contact with fish and corals.
  • To prevent stress to the corals, the maximum daily increases of each of the elements are as follows: Calcium 20ppm; Alkalinity 0.5 meq/l (1.4 dkh); Magnesium 10ppm. Larger adjustments should be spread over a few days according to the daily maximum.
  • In order to prevent the effects of unbalanced levels of the foundation elements, supplements should be added in the following order allowing 10 minutes between each:
    • 1st - Magnesium
    • 2nd - Alkalinity
    • 3rd - Calcium

Important Notes for Using the Reef Foundation Titration Test Kits

  • Before testing, clean the glass vial and the large syringe by rinsing with the water to be tested.
  • After testing, rinse all syringes and vials with RO or distilled water before storing. If vials are left unwashed, a residue can form that will affect the results of future tests. Use a slightly acidic solution such as vinegar to remove the residue.
  • Close all reagents tightly immediately after use.
  • The test reagents are stable up to the date stated on the pack when stored closed between 15 - 25°C (59 - 77°F).
  • Store the reagents in the plastic box to prevent damage from prolonged exposure to light.

Note for Filling the 1ml Titration Syringe
Raise the plunger of the syringe until the bottom ring of the plunger is at the 1.0 ml mark. The surface of the liquid will be approximately 0.1 - 0.15 ml below the plunger.

Do not try to remove the air trapped between the liquid and the plunger. This small volume of air corresponds to the liquid held inside the plastic tip.

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