SEACHEM REEF STATUS – MAGNESIUM

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75 titration tests each for borate, carbonate & magnesium
Directly measures magnesium
Measures carbonate and borate alkalinity
Interference free
Easy test validation with included reference

This seawater testing kit provides 75 titration tests each for borate, carbonate, magnesium. It lets you measure and keep magnesium and key element levels in marine aquarium close to that of seawater.

Advantages
Natural seawater concentration for magnesium is approximately 1,300 mg/L. The magnesium concentration in kalkwasser treated aquaria may be as low as 600 – 700 mg/L. In general, it is prudent to maintain magnesium concentrations in reef aquaria between 1,200-1,400 mg/L.

Natural seawater has a total alkalinity of about 2.5 meq/L, of which about 0.1 – 0.2 meq/L is from borate. In an aquarium, it is advantageous for both pH control and improved calcium stability to have a higher borate content. This, however, should not be at the expense of carbonate. It is useful, then, to maintain a total alkalinity of about 4 – 5 meq/L with a borate component of about 1.5 – 2.0 meq/L.

Accuracy
Range:

Magnesium: 125 mg/L and over 1250 mg/L
Alkalinity: 1 meq/L and over 10 meq/L
Detectable changes in the following increments:

Magnesium: 12.5 mg/L
Alkalinity: 0.1 meq/L
Magnesium Test
The test is based on titration of magnesium with EDTA in the presence of a magnesium specific indicator dye after the co-precipitation of calcium and strontium. During the testing procedure, the sample transitions between pink and blue. Once the sample turns blue, the test is complete. Magnesium concentration corresponds to markings on the titration syringe.

Alkalinity Test
The test is based on titration of carbonate and/or borate with acid in the presence of a pH indicator dye (endpoint = pH 4 for total alkalinity and endpoint = pH 6 for borate alkalinity). During the testing procedure, the sample transitions between blue and yellow. Once the sample turns yellow, the test is complete. Alkalinity levels correspond to markings on the titration syringe.