Page 23 - Water and the Aquarium

GARGAS: Water and the Aquarium Page 23
GARGAS: Water and the Aquarium Page 23
GARGAS: Water and the Aquarium Page 23
GARGAS: Water and the Aquarium Page 23

A Review of Some Different Measurements
A Review of Some Different Measurements
A Review of Some Different Measurements
and Conversion for Two Water Tests
and Conversion for Two Water Tests
and Conversion for Two Water Tests
Prior to WWII the European measurements for Hardness and Alkalinity
Prior to WWII the European measurements for Hardness and Alkalinity
where measured as “Deutsch Hardness” which later became “Degrees Hard-
where measured as “Deutsch Hardness” which later became “Degrees Hard-
Prior to WWII the European measurements for Hardness and Alkalinity
ness” . . . “DH”. Interestingly Europeans then accepted the universal
ness” . . . “DH”. Interestingly Europeans then accepted the universal
where measured as “Deutsch Hardness” which later became “Degrees Hard-
measurement of ppm or parts per million, which is the same as milligrams
measurement of ppm or parts per million, which is the same as milligrams
ness” . . . “DH”. Interestingly Europeans then accepted the universal
per liter. The funny thing is that the American aquarists continued to use
per liter. The funny thing is that the American aquarists continued to use
measurement of ppm or parts per million, which is the same as milligrams
the measurement of DH or Degrees Hardness even after it died out in Europe.
the measurement of DH or Degrees Hardness even after it died out in Europe.
per liter. The funny thing is that the American aquarists continued to use
the measurement of DH or Degrees Hardness even after it died out in Europe.
The following water analysis are expressed in DH:
The following water analysis are expressed in DH:
GH- General Hardness
The following water analysis are expressed in DH:
GH- General Hardness
KH- Alkalinity
GH- General Hardness
KH- Alkalinity
Each degree of Deutsch Hardness (DH) = 17.8 ppm or mg/l
Each degree of Deutsch Hardness (DH) = 17.8 ppm or mg/l
KH- Alkalinity
So a reading of 200 ppm General Hardness would be 11.24 DH (200/17.8),
So a reading of 200 ppm General Hardness would be 11.24 DH (200/17.8),
Each degree of Deutsch Hardness (DH) = 17.8 ppm or mg/l
however remember, DH is not generally accepted now!
however remember, DH is not generally accepted now!
So a reading of 200 ppm General Hardness would be 11.24 DH (200/17.8),
however remember, DH is not generally accepted now!
In the US within the potable water industry another old method is still
In the US within the potable water industry another old method is still
around. It is known as grains per gallon GPG. Any company that sells and
around. It is known as grains per gallon GPG. Any company that sells and
In the US within the potable water industry another old method is still
installs water softening equipment uses this very primitive measurement. Each
installs water softening equipment uses this very primitive measurement. Each
around. It is known as grains per gallon GPG. Any company that sells and
grain per gallon is equal to 17.1 part per million or milligrams per liter but as
installs water softening equipment uses this very primitive measurement. Each
grain per gallon is equal to 17.1 part per million or milligrams per liter but as
an aquarist you need not worry about this measure.
grain per gallon is equal to 17.1 part per million or milligrams per liter but as
an aquarist you need not worry about this measure.
an aquarist you need not worry about this measure.
Universal Chemistry and Engineering practices always use
Universal Chemistry and Engineering practices always use
PPM - Parts Per Million
PPM - Parts Per Million
Universal Chemistry and Engineering practices always use
Or
Or
PPM - Parts Per Million
mg/l – milligrams per liter
Or
mg/l – milligrams per liter
mg/l – milligrams per liter To Table of Contents
To Table of Contents
To Table of Contents