Even Easier to Use Test Kits from Salifert | Interzoo 2014
The alkalinity test, for example, only utilizes one reagent. You add drops of the reagent to your sample and count the number of drops until the sample changes color. Each drop represents .5dkH, so the solution changes color after you have added 20 drops, you know your dkH is 10. This makes for a very easy to use test that still has a resolution of .5dkH.
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