DKH to ALK?

[Flightpipe]

My API reef test kit has a DKH test instead of alk. I looked around Google and its just confusing me.

What is the difference between DKH and AKL and should u just go get an Alk test?

 

[Saltz Creep]

Just convert

ALK= dKH/2.8

 

[Randy Holmes-Farley]

This article may be useful in many similar situations:

The Units of Measure of Reefkeeping
http://reefkeeping.com/issues/2005-08/rhf/index.php

from it:

Alkalinity is a measure of the amount of acid necessary to reduce water's pH to the point where all carbonate and bicarbonate have been converted into carbonic acid (about pH 4.2 in seawater). In seawater, bicarbonate and carbonate provide nearly all of the alkalinity. Consequently, reef aquarists can use it as a surrogate measure for bicarbonate and carbonate which are taken up by calcifying organisms (Figure 1). The units of alkalinity can be meq/L (milliequivalents per liter), dKH (degrees of carbonate hardness), or ppm (meaning ppm of calcium carbonate equivalents). One meq/L = 2.8 dKH = 50 ppm CaCO3 equivalents. Seawater has an alkalinity of about 2.5 meq/L = 7 dKH = 125 ppm CaCO3 equivalents.

Alkalinity is not a measure of pH, although some people talk of it that way, nor is it a very useful indicator of a solution's buffering capacity, although it is related strongly to buffering capacity. An article explaining in detail what alkalinity is and what its units mean is online here. There is a calculator for converting between different alkalinity units online here. Here is an online calculator for determining how much of different supplements to add to boost alkalinity, as well as calcium and magnesium.

 

[Flightpipe]

Randy,

Thank you very much that is exactly what i needed!
Google can be you best friend sometimes or the most confusing resource ever.