calculate KH

[marc-olivier]

Hi all, have a question for you about the KH calculation. I try to understand how they calculate a KH between 0-10 ?
I use Nutrafin Tester KH/GH and the result I got for my 33GL is less than 20mg/L.
But 0 to 10 of KH tell me nothing... could you help me!?

 

[unwritten law]

Explanation of Water Hardness

you can google it.... yours is pretty soft... congrats...

 

[marc-olivier]

Thanks!
I found another site about Water Hardness in aquariums
Water Hardness in the aquarium

I also got a reply that I post to you:
When dealing with units of kH, one degree is equal to about 17.848 milligrams of calcium carbonate (CaCO3) per litre of water (17.848 ppm). This means that 0 to 10 degrees kH is equal to 0 to 178.48 mg/l.