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Elos Aqua Test Kit - Magnesium
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Elos Aqua Test Kit - Magnesium

In stock: Order by 2PM EDT for same-day shipping (M-F only)

Item #: EO4129

MSRP: $41.99 Save: $16.00 (38%)
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Quick Overview

Make an accurate test on the magnesium particulates in your lovely aquarium using the very reliable Elos Aqua Test Kit - Magnesium from Pet Store . Having this element's value in your pets' abode is important as it is known to he...

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Product Description

Elos Aqua Test Kit - Magnesium Information

Product Manuals & Documentation


Make an accurate test on the magnesium particulates in your lovely aquarium using the very reliable Elos Aqua Test Kit - Magnesium from Pet Store. Having this element's value in your pets' abode is important as it is known to help eradicate bryopsis and turf algae. However, it must be controlled and be kept over 1500 ppm that is why you need this kit to monitor it and keep the measurements on the desired level.

Further, this test kit by Elos Aqua is most suitable to be used in aquariums and tanks that have large quantities of stony corals and other high end ones. You will not be disappointed when you will use it as it is a known quality product with a solid reputation.

Moreover, the Elos Aqua test kit - Magnesium package includes instructions that are detailed and easy to follow. More than that, the kit is complete, and you can do up to 40 tests with it. Even better, you can determine the titration without much difficulty as the change of color will happen dramatically. Because of this, you will be able to match the resulting color with the ppm content.

Now, you can know and manage the Magnesium value in your aquarium using a dependable and easy to use test kit.


Magnesium (Mg) is present in a high quantity (1300-1350 ppm) in natural seawater. Contrary to its not only quantitative significance, this element was ignored as an important parameter of the marine aquarium for a long time.
We know today that Magnesium creates a remarkable improvement in the growth of calcareous algae and also has a positive influence on the growth of invertebrates and macro algae. The ideal value of Magnesium in the aquarium is: 1100-1300 mg/Lt for the marine aquarium. Because of the importance of Magnesium, it is necessary to keep the proper level by testing it with an accurate test kit.

ELOS AquaTest Mg, as well as all titrimetric test kits of this line, grant very high precision thanks to several procedures like the use of calibrated droppers with constant and predefined drops of 0.03 ml each, the validation of our reagents, through NIST (National Institute of Standard and Technology) validation and the careful stock management to supply to our customers ONLY the freshest production batch.


  • High quality system: one powder reagent and two liquids!
  • Standard sensibility: 100 ppm of Magnesium ions.
  • NIST validation: each batch of reagents is validated using NIST (National Institute of Standard and Technology) samples
  • "C" reagent available as separate sales unit
  • High number of test per kit: up to 50 test (with a standard Mg level of 1100 ppm)
  • "Safe reagents": reagents and testing procedures are based on Low Risk Reagents. None of our test kits are based on Toxic Reagents.
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    Elos Aqua Test Kit - Magnesium Reviews

    Average Reviews

    Customer Reviews

    Easy to use Product Review by GARY R JANSSEN (Posted on 2/26/14)

    Comments: My wife does the testing (I take care of almost everything else) so I can only relate to what she has told me. We tried a few other test kits and the ELOS seemed to be inline with test results from other kits. My wife likes the ELOS test kits because in her opinion they are easier to use and we seem to get fairly accurate results (compared with other test kits). We have never sent in samples to a lab but my tank is thriving so I'll go by that until I have the feeling to think otherwise.

    Fast and easy Product Review by MATT KEPLER (Posted on 2/26/14)

    Comments: Super easy test to perform. Fast color change at the transition point, much better than a color chart. The test is similar to a KH test in that you count the number of drops of the final reagent.

    Excellent Product Review by kamar (Posted on 3/3/10)

    Comments: Once you get the hang of how to use this test kit, it's actually very easy. I read a couple of the reviewers comments before ordering it, and learned that the key here is that this is a TWO PART TEST. Be sure to dump out the first color change from red/orange to green; then count drops again for the color change from pink to blue. Color change is very dramatic and easy to see, and the test is accurate to increments of 50.

    Good Test Kit Product Review by BRIAN PALMER (Posted on 2/16/10)

    Comments: A agree with the person that put one star about the directions. I did the test 3 times before I figured out I wasn't dumping out the first phase test. So I wasted a lot of drops.
    To save anyone some frustration after the water turns green from test bottle A... dump out the water before going to the next test phase.

    So the directions could be more clear but I ended up liking the test vs. other popular brand.
    One reason is it can measure well above 1500. And I have added too much Mg more than once.

    The last brand I was using maxes out around 1500 cuz the syringe simply won't hold more.

    As far as 100 increments that's what I was expecting from reading about it but my directions lead me in 50 increments.

    On the second phase .. .if you have drops after the math.. it would be 1200... 26 drops would be 1250.

    Best Mg Kit Out There Product Review by GEOFF (Posted on 8/23/09)

    Comments: After trying many of the "quality" kits out there, I settled on this as testable to 50 ppm, consistent from batch to batch, and being color blind for certain colors, it is very easy for me to see color changes for the two part test (Orange to Green and Pink to Blue). It is very easy to use.

    The reviews saying only 100 ppm accuracy is incorrect and trying to sell you the test kit they mentioned which I tried and did not like as not consistent and hard for me to see color changes.