Marine Power Easy MAGNESIUM 500ml

Tax included

MARINE POWER EASY MAGNESIUM has been designed to raise the level of magnesium in the marine aquarium and it is recommended for smaller tanks occupied mainly by soft corals.


MARINE POWER EASY MAGNESIUM has been designed to raise the level of magnesium in the marine aquarium and it is recommended for smaller tanks occupied mainly by soft corals.

The importance of magnesium in the aquarium:
Magnesium is quantitatively the third, after sodium and chloride, component of the seawater. Its presence in the salt water supports the availability of calcium and strontium for calcification of corals (SPS/LPS) and many other marine organisms, such as snails or mussels. Magnesium is also an important bio-element for marine organisms, because it participates in many metabolic processes.

The optimal level of Mg:
The level of magnesium in coral seas is about 1280-1320 mg/l. In the majority of marine aquariums, the level of magnesium should be maintained at a stable and similar range. Small deviations of 10-15% are not dangerous for the invertebrates in the aquarium, although they can stress the corals.

In the properly functioning marine aquarium, the level of magnesium is constantly decreasing, mainly due to the calcification process. Although magnesium is not the main component of the coral skeleton, its ions are often built in the skeleton and for some species of corals, magnesium accounts for over 3% of the skeleton structure. In addition, magnesium prevents excessive precipitation of calcium carbonate. Decrease of the magnesium should be supplemented daily with MARINE POWER EASY MAGNESIUM. Magnesium consumption depends on many factors, such as: water temperature, lighting, type of stock in the aquarium and others, and its level requires regular checking.
Therefore, Mg supplementation must be constantly controlled and adjusted to the needs of the aquarium. To determine the level of magnesium, we recommend MARINE POWER XACT TEST MAGNESIUM. With the test you can easily determine the current level of Mg and its loss, e.g. during the week.

Determining the average daily Mg consumption:
If mainly soft corals are kept in the tank, the daily Mg consumption may be small and may vary on a daily basis, therefore we recommend calculating average daily Mg consumption. To determine that, two measurements of Mg should be made with an interval of 4-5 days. It is important that both tests are made at about the same time of the day and that water changes (if done every week) are made at least 24 hours before or after the tests. This way, they will not affect the results. In a healthy aquarium the first Mg score should be higher than the second. Then we subtract the second result from the first, and divide the obtained value by the number of days (minus 1) between the two tests.

Day 1: Mg = 1340 mg/l
Day 5: Mg = 1300 mg/l
Mg drop = 1340 - 1300 = 40 / 4 days = 10 mg/l per day
The result tells us, by how much the daily Mg supplementation should be increased. If the result equals 0, Mg supplementation is not required.
Please remember that Mg consumption will change with the growth of corals and other invertebrates in the aquarium. Therefore, this process should be repeated every couple of weeks.

The dosage of MARINE POWER EASY MAGNESIUM depends on the daily magnesium consumption. One full cap of the liquid will increase the level of magnesium by about 20 mg/l in 100 l of water. Dosage for larger tanks is presented in the table.

mg / l

100 l

 200 l

300 l

400 l

500 l

½ cap (10 ml)






1 cap (20 ml)






2 cap (40 ml)






3 cap (60 ml)






The contents of the cap should be added into the aquarium near the circulating pump, so the liquid can be distributed effectively in the aquarium. 
In case of higher consumption of magnesium, we recommend our MARINE POWER ADVANCED MAGNESIUM product.

Due to the potential stress to the inhabitants of the aquarium, the daily Mg increase should not exceed 80 mg/l.
Note: Excess and deficiency of magnesium can be both harmful to marine invertebrates, so you should regularly check the magnesium level in the aquarium.


Specific References