Red Sea Calcium Pro Test Kit

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Red Sea Calcium Pro Test Kit

100% Recommend this to a friend (14 of 14)

SKU: 207089

reg. $34.99

Special Price: $25.28

In Stock: 120
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Quick Overview

Why does BRS recommend this?

Our favorite all around test kits are the red sea kits.  With easy to follow directions, and consistent results, the Red Sea Calcium Pro test kit can always be found in our testing closet.  The titration is made even easier with the included syringe holder that makes it much easier than almost all other Calcium test kits.

Healthy coral growth depends on providing a proper balance of Calcium, Alkalinity and Magnesium. Red Sea Calcium Pro Test Kit accurately measures calcium levels.

Calcium Kit includes:

  • 75 tests

  • Analytical grade glass vials

  • Easy-to-use, high precision Titrator

  • Affordable reagent refills


Full Details

Owners Manual


Red Sea produces a line of kits they call the Reef Foundation kits including Calcium, Alkalinity and Magnesium. Providing a balance of these elements promotes proper coral health and growth.

Red Sea Calcium Pro Test Kit Includes:

  • 75 tests
  • Accuracy: ±2.5 ppm
  • Range: ∞
  • Test Type: Titrator
  • Affordable reagent refills

A successful coral reef aquarium depends on how well you maintain the water parameters which are the key to a stable coral environment. All of the elements found in natural seawater play a role in providing optimal water parameters, but some are more significant than others. These elements, the foundation of the reef environment, include the three major elements: Calcium (Ca), Magnesium (Mg) and Carbonates (CO3). All three have a major effect on water chemistry (pH stability, Alkalinity, ionic strength) and on many of the coral’s biological processes (skeleton formation, ions exchange, photosynthesis).

The foundation elements complement each other in the formation of coral skeleton. If not balanced correctly one of the elements will quickly limit healthy coral growth.  Using Red Sea test kits will allow you to accurately measure these levels and guide you on your path to reefing success.


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  • high grade kit By scott on 9/14/2017

    love the red sea pro kits. this one is no exception. it's simple to use and titration is easy with the handheld titrator. thank you red sea.
  • The Best By Kurt on 7/19/2017

    The best on the market. It's easy to use. It's very accurate. It's simple. This makes it the best for me. I used a ton of other brands. I'll be sticking to this one.
  • Simple By Yamil on 4/8/2017

    Love it... simple and accurate!
  • The only test kits to own By LBK on 11/30/2015

    Over the years I have learned to standardize on Red Sea Kits. They are a top quality product with very accurate results. It is noise that refills are available as well. If you know you are going to stay in the hobby (for me now 40 years) you have to buy this kit. It is the best and the cheapest in the long run...A pretty good combination
  • Good Stuff By Marc on 5/27/2015

    Easy to use and accurate. The included titrator makes it easy to add a drop and mix with one hand. The plastic box keeps the kit well organized. Reagent refill kits are available which makes this very affordable in the long run.
  • Better built than others By Casey on 3/12/2015

    It's simular to other kits, but the pieces are well thought out and don't seem as cheap as the others.
  • Great Test Kit By Ryan on 11/7/2014

    Red sea has some of the best test kits available and this one is no exception. Way more accurate than my API. I love that they are refillable too.
  • Major color shift By Ray on 10/27/2014

    No more squinting at a piece of colored paper. No more "did it change or didn't it?" One drop, one major color shift. And the titrator makes it easy to drop and swirl with one hand. Great kit.
  • Wow! By jonathan on 8/11/2013

    This test kit is great. Red sea makes these so simple to use and they are very accurate. I am also a fan of the case it comes with to keep everything organized.
  • Better Than API Test Kit By Mike on 3/25/2013

    More Accurate test kit than the API drop test kit and it works great when used right but I give it a 4 because I don't think the instructions are specific enough and I just wish chemicals would have a totally different color from purple to like green at the end because I am color blind and have trouble telling the difference from purple to blue. Pink to purple is fine but the end just kills me XD
  • Very accurate By George on 9/21/2012

    Great test kit. Very accurate. Get the Alk, Ca, Mg for a better deal if you don't already have them
  • Accurate By jeff on 6/13/2012

    Test is very easy to use and gives accurate results...easy to read the color changes


Ask a question

Product Questions

just started using this kit,I am confused on how to read the syringe, I watched the video,it did not show up close on how to read it, in the video he said not to look at the plunger position but the amount of titrant used. in the instructions it says to note the amount of titrant used according to the initial and final position of the plunger not the liquid surface .so if the plunger's final position it at the 0.3 number is that the number I use to compare at the chart. or do I look at the liquid level which is just below the plunger?? confused sorry..
Question by: val sammut on Jan 26, 2017 11:11:00 AM
Great question! The syringe is 1mL, so each numbered mark is 0.10mL (1/10th). If your plunger stops at 0.50mL, then you used 0.50mL of reagent. Each numbered mark you pass after 0.50mL will be an additional 1/10th of a mL. All of that said, if the bottom of your plunger is right on the 0.30mL mark, then you've actually used 0.80mL. Take that back to your chart and get your reading! :-) Hope that helps!
Answer by: Randy (Admin) on Jan 29, 2017 6:37:00 PM