What Dgh Scale Is Correct?

[blue acara]

looking at the back of Kents RO Right is says (in TDS)

80-125 ppm=1-3 dGH
160-230 ppm=3-6 dGH


but on the API test kit it says

0-50 ppm=0-3 dGH
50-100=3-6
100-200=6-11

its a boring post i know... but which is correct? im guessing api.

 

[George Farmer]

1 dH = 17.9ppm

The Kent is way off.

 

[Themuleous]

Yeh I used to use Kent RO right and it was shocking how far off it was went I mixed up the solution.

Sam

 

[blue acara]

cheers