JBL Magnesium/Calcium Test
Quick test for the determination of the magnesium/calcium content in marine aquariums

  • Simple and reliable control of water values in aquariums. Determines the ideal magnesium and calcium value for magnificent growth of corals and calciferous red algae
  • Easy to use: carry out the magnesium test: first carry out the calcium test, then the magnesium test; subtract the result of the calcium test from the result of the magnesium test – result is magnesium content
  • Reach: number of measurements depends on the height of the calcium and magnesium content
  • Online Laboratory: free analysis and recommendations for the water values you have measured
  • Package contents: 1 test kit Mg magnesium, 1 test kit Ca calcium, incl. 5 reagents, plastic cuvette, syringe, dosing spoon. Refill reagents available separately
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Recommended retail price incl. VAT
Available from your specialist dealer.
Dealer close to you
You can find this article at your specialist shop and online
Recommended retail price incl. VAT
Available from your specialist dealer.
Dealer close to you
You can find this article at your specialist shop and online

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Product information

Healthy aquariums with conditions close to nature
The right water values are dependent on the fish stock, and the algae and corals in the aquarium. Even if the water looks clear it can be contaminated. With bad values diseases or algae can appear in the aquarium. To maintain a healthy aquarium with conditions close to nature it is important to check and adapt the water values regularly

Why test?
Along with calcium, magnesium creates the general hardness. Magnesium is, like potassium, a macroelement, which is necessary for the healthy and vigorous growth of corals. Too low calcium and magnesium levels affect coral growth and prevent beautiful calciferous red algae from growing.

Recommended calcium values:
Marine water aquarium: 1200-1600 mg/l

You can analyse the water values you have measured in the JBL Online Laboratory free of charge and receive recommendations.

In recent years we had observed that our magnesium test with the factor 100 was showing too little magnesium. On expeditions in the “original marine water,” however, we were still able to measure the correct values, and this indicated that the low measurements were due to the artificially prepared marine water.
After that we carried out extensive tests with the various salt mixtures available on the market from various suppliers. The difference to original marine water came from the recently used magnesium salts and trace elements in the sea salt mixture, which caused a deviation of about 20-30%.
After our tests we modified the instructions in order to increase the multiplication factor from 100 to 120 in order to adapt it to the sea salt mixtures currently on sale.
As a result we can once again carry out precise measurements on artificial sea salts by using factor 120. With natural marine water we still use factor 100.

Details

JBL Magnesium/Calcium Test-Set Mg/Ca

Art. no.:
2540200
EAN Code:
4014162254023
Volume packaging:
0.800 l
Gross weight:
95.000 g
Net weight:
66 g
Weight factor:
1000
Size(l/h/w):
43/175/106 mm

JBL Magnesium Reagent

Art. no.:
2540300
EAN Code:
4014162254030
Volume packaging:
0.450 l
Gross weight:
72.000 g
Net weight:
41 g
Weight factor:
1000
Size(l/h/w):
30/140/107 mm
FAQ
Why are there no colour charts for the JBL GH test, the JBL KH test, the JBL calcium test Ca and the JBL magnesium test Mg?

The following tests from the test range are so-called titration tests: JBL GH test, JBL KH test, JBL calcium test Ca and JBL magnesium test Mg, where the number of drops are counted until the colour changes and the counted value is multiplied by a value:

GH = number of drops = general hardness in °dH

KH = number of drops = carbonate hardness in °dH

Magnesium + calcium = number of drops * 120 = amount Ca + Mg in mg/l

Calcium = number of drops * 20 = amount Ca in mg/l

Magnesium = amount Ca+Mg from magnesium test - amount Ca in mg/l = magnesium in mg/l

Why do I now have to use the factor 120 instead 100?

In recent years we had observed that our magnesium test with the factor 100 was showing too little magnesium. On expeditions in the “original marine water,” however, we were still able to measure the the correct values, and this indicated that the low measurements were due to the artificially prepared marine water.
After that we carried out extensive tests with the various salt mixtures available on the market from various suppliers. The difference to original marine water came from the recently used magnesium salts and trace elements in the sea salt mixture, which caused a deviation of about 20-30%.
After our tests we modified the instructions in order to increase the multiplication factor from 100 to 120 in order to adapt it to the sea salt mixtures currently on sale.

As a result we can once again carry out precise measurements on artificial sea salts by using factor 120. With natural marine water we still use factor 100.

What can I do when the measured value of a water test falls outside the scale?

If one of your measurements reaches the end of the colour chart scale you can multiply the scale, by diluting the following tests with distilled water (e.g. JBL Dest).

Here’s how to do it: dilute the sample with distilled water and carry out the test once more.

Her’s how in greater detail:
JBL GH test kit: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH.
JBL KH test kit: Instead of 5 ml use 10 ml aquarium water. Now 1 drop is equivalent to 0.5 dGH.

Note: when using 10 ml sample water the colour development is weaker with the first drops than with 5 ml sample water. Put the measuring container on a white underlay for a better readability.

JBL NH4/NH3 Ammonium/Ammonia test kit, JBL NO2 Nitrite test kit, JBL Fe Iron test kit and JBL Cu Copper test kit:
2.5 ml sample + 2.5 ml dist. water: result times 2
1 ml sample + 4 ml dist. water: result times 5
0.5 ml sample + 4.5 ml dist. water: result times 10

NO3 Nitrate test kit, JBL SiO2 Silicate test kit, JBL PO4 Phosphate sensitive test kit and JBL Mg Magnesium test kit freshwater:
5 ml sample + 5 ml dist. water: result X 2
2 ml sample + 8 ml dist. water: result X 5
1 ml sample + 9 ml dist. water: result X 10

JBL PO4 Phosphate test kit koi high range:
2.5 ml sample + 2.5 ml dist. water: result X 2
1 ml sample + 4 ml dist. water: result X 5

JBL K Kalium test kit:
7.5 ml sample + 7.5 ml dist. water: result X 2
3.75 ml sample + 12.25 ml dist. water: result X 5
1.5 ml sample + 14.5 ml dist. water: result X 10

JBL CO2 direct test kit, JBL Ca Calcium test kit and JBL Mg+Ca Magnesium+Calcium test kit:
not required

Do my water tests still work although they have been open for nine months?

Basically a sealed test keeps longer than an open one. How much the shelf life is reduced depends crucially on the handling and the storage conditions of the reagents. It may happen that a reagent in a test that has been open for 9 months doesn’t indicate correctly any more. However, additional information is needed to answer this question properly.

What is the shelf life of the JBL Magnesium/Calcium Test ?

The JBL magnesium/calcium test has a shelf life of 2 years in the original sealed bottle.

The following is printed on the bottom of the packaging:

CH/B: 2263 (e.g.) = batch number
BBD: 05/12 (e.g.) = best-before date (month/year)

Please note that the best-before date does not apply for opened reagents. Exposure to atmospheric oxygen decreases the shelf life.

The shorter shelf life compared to the JBL calcium test is due to the reagents for magnesium.

Blog – Opinions & Experiences

20.04.2017

Pflegemittel - Die besten Lösungen für Ihr Aquarium

Mit den richtigen Produkten ist die Aquarienpflege nicht nur einfach, sondern kann auch viel Spaß machen! Die auf intensiver Forschung basierenden Zusammensetzungen der JBL Produkte sind zwar gerade bei Pflegemitteln nicht immer auf den ersten Blick erkennbar, aber auf jeden Fall mittel- und langfristig am schönen Aquarium und gesunden Fischen abzulesen.

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22.10.2016

Inaccurate water tests – or did I do something wrong after all?

In the aquarium scene we often hear people talking about “accurate” and “inaccurate” tests. But mostly they mean a rougher or finer scaling of the output values.

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28.09.2016

Testing water – here’s how

The water in your aquarium is outstandingly significant because it is a life-giving element for fish and plants.

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18.09.2016

Keeping an eye on the most important water values

Professional water analysis sounds very expensive. But the professional water testing in your aquarium or pond at home also works on a high level and above all it is simple and inexpensive.

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Laboratories and calculators

Water Analysis Online Laboratory

Enter your water parameters and get an in-depth analysis of your values in a matter of seconds. You enter your water values – and we analyse! Here you have the opportunity to enter the measured water values directly into the JBL Online Laboratory. This will analyse your values and explain and submit corrective measures.
Worth reading

Setting up a saltwater aquarium

You will find ideas and help for all questions related to your aquarium here, no matter if it’s about fish diseases, water analysis or how to set up an aquarium. You will also find the latest trends and activities which could be important for you.

Solving algae problems in saltwater

Algae belong to a seawater biotope as much as corals do. Only when algae start to take the upper hand do measures need to be taken against them. Because marine algae are very varied, it is best to explain how to deal with the individual marine algae.

Optimising water values

Having the correct water values guarantees you a functioning and beautiful marine aquarium. We’ll show you how to get them.
Download

Instructions

  • JBL Magnesium- Calcium Test
    Size:
    1 MByte
    Download
  • JBL Magnesium-Calcium Test
    Size:
    1 MByte
    Download

safety instructions

  • JBL Magnesium Calcium Test Magnesium Refill
    Size:
    90 kByte
    Download
  • JBL Magnesium Calcium Test
    Size:
    191 kByte
    Download
spare parts
accessories
Safety information
safety information in accordance with GHS
Hazard symbol
  • GHS05
  • GHS02
  • GHS07
Risk phrase
H226: Flammable liquid and vapour.
H314: Causes severe skin burns and eye damage.
H335: May cause respiratory irritation.
safety note
P101: If medical advice is needed, have product container or label at hand.
P310a: Immediately call a POISON CENTER/doctor.
P102: Keep out of reach of children.
P103: Read label before use.
P210: Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal word
Danger