Drop Calculator — GH & KH | David San Luis Aguirre

KH

Carbonate alkalinity

Color change: blue → yellow

How many drops did you use?

0 ppm

< 40 40 – 70 > 70

ppm · SCA ideal range

GH

General hardness

Color change: orange → green

How many drops did you use?

0 ppm

< 50 50 – 175 > 175

ppm · SCA ideal range

Quick reference

1 drop = 1 dGH/dKH = 17.9 ppm

2 drops35.8 ppm

3 drops53.7 ppm

4 drops71.6 ppm

5 drops89.5 ppm

6 drops107.4 ppm

7 drops125.3 ppm

8 drops143.2 ppm

10 drops179.0 ppm

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