what is the difference between MEQ/L and dKH in reference to alkalinity?

Question

My alkalinity for my tank is 7 (?) and I was told that it needs to be between 8 and 12 (?). I have "reef builder" to raise the alkalinity of my tank and I am trying to figure out how much to use.

Answer 1

Alkalinity is measured in one of three units: milliequivalents per liter (meq/l), German degrees of hardness (dKH) or parts per million of calcium carbonate (ppm CaCO3). Any of the units may be employed but dKH is most commonly used in the aquarium hobby and meq/l is used exclusively in modern scientific literature. The conversion for the three units is: 1 meq/l = 2.8 dKH = 50 ppm CaCO3

A rule of thumb is To raise 50 gallons of tank water by 1 meq/L will require about 16 grams of sodium bicarbonate. A level teaspoonful of baking soda weighs almost 6 grams, so 2 and one-half ( 2&1/2) teaspoonsful will raise the alkalinity in 50 gallons by 1.0 meq/L .
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Answer 2

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Answer 3

Here's some additional referencing for you...
http://www.purchon.com/chemistry/ph.htm