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Ciao Lele ti riporto la risposta della Brightwell Aquatics, domani cerchereme di fare anche la traduzione:

Quote:

Chris Brightwell ha scritto: The concentration of magnesium in Magnesion is 100,000 ppm, which corresponds to an increase of 26 ppm in 1 US-gallon (3.785L) of water per ml of MAG added; 3.846 ml would be required to increase the concentration by 100 ppm in 1 US-gallon, so 480.8 ml is required to increase the [Mg2+] in 125 US-gallons of water. Some thoughts: - Magnesion is the strongest magnesium solution that I am aware of being offered by any U.S. manufacturer; in fact, it is over 40% stronger than the next strongest competing product, to my knowledge, and I believe that the purity of ingredients we use far exceeds that used by our competitors. - High-purity magnesium salts are extremely expensive, and we try to balance the cost of the ingredients with the prices that aquarium hobbyists are comfortable paying for this sort of product; the presence/absence of high-quality magnesium is the largest single factor in the price of aquarium salt (as a point of reference). - An additional reason that we do not add more magnesium to Magnesion than 100,000 ppm is that a high-energy exothermic reaction takes place when mixing the magnesium salts in with the purified water; this reaction creates so much heat that greatly exceeding the current concentration would melt our mixing vats and damage our equipment. This is no joke! Far more heat is created than when mixing CaCl2 with water! - For an aquarium of 500L that is so low in magnesium, I would recommend that the hobbyist use a more concentrated (and economical) magnesium product, such as Magnesion-P, to correct the deficiency; alternately, the hobbyist can perform a large water change with a premium salt blend to help increase the magnesium concentration. Magnesion (liquid) may then be used to compensate for the relatively small amount of magnesium that is depleted from the water during reactions with carbonate ions and the extraction of aragonite-depositing organisms such as corals, coralline algae, clams, etc., and their respective allies. - It is not feasible to discuss the maximum saturation of any element in terns of “1.6 kg per liter at 20°C”; the saturation depends on the chemical attributes of the salt from which the element is being obtained (e.g. magnesium sulfate, magnesium chloride, etc.). Because the ratios of magnesium salts in Magnesion are proprietary, I am unable to discuss the maximum saturation of those ingredients in our formula. I hope that your client can appreciate this need for company security. We always make the maximum effort to provide products that will have the best possible positive impact on an aquarium. As always, please let me know if you have any additional questions. Kindest regards, Chris CR Brightwell Marine Scientist President Brightwell Aquatics