Reef Advantage Magnesium, 1.2 kg / 2.6 lbs

Severely depleted levels of magnesium (below 800 mg/L) can cause depressed pH levels and an inability to maintain proper magnesium levels. The most frequent causes of magnesium deficiency are use of kalkwasser, frequent overdosing of a carbonate additive, or low levels in the salt mix itself. Kalkwasser, for instance, precipitates magnesium as magnesium hydroxide while excess carbonates precipitate it as magnesium carbonate. In both cases, this means that magnesium that was present in the water is now unavailable. Of the two, magnesium hydroxide and magnesium carbonate, the former is more problematic; it is extremely insoluble. Once magnesium has precipitated as magnesium hydroxide, it will never redissolve. Magnesium carbonate will redissolve; however, it does so slowly. So, while it will go back into solution, there will be a significant portion of time in which magnesium levels are depleted.
Reef Advantage Magnesium™ is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural sea water. Reef Advantage Magnesium™ contains no ammonia. This is a common contaminant in every liquid magnesium supplement on the market.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 3.75 x 3.75 x 7.75 inches; 2.44 Pounds
Item model number ‏ : ‎ 637
Date First Available ‏ : ‎ August 28, 2008
Manufacturer ‏ : ‎ Seachem Laboratories, Inc.
ASIN ‏ : ‎ B001F0MMBO
Country of Origin ‏ : ‎ USA

Raises magnesium and contains no ammonia
A concentrated optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium
Minimal impact to the ionic ratios found in natural sea water
Contains no ammonia, a common contaminant in every liquid magnesium supplement on the market
300 grams treats 1200 US gallons