BS POOL Pro Série Manuel D'entretien page 18

Hardness Conversion Tables
A conversion table appears below that shows the different units for measuring
hardness:
1 German degree
1 mg/ l of Ca CO 3
1 English degree
1 French degree
Classification of water according to its hardness
The most serious drawback of hard water is the precipitation of calcium and
magnesium salts that form incrustations. The pipes that hard water flows through,
whether hot or cold, become blocked with the consequent reduction in their
effectiveness. Pumping installations require higher power to obtain the same flow and
pressure conditions.
Soft
Moderately soft
Slightly hard
Moderately hard
Hard
Very hard
Cleaning recommendations according to hardness
Very Soft and Soft, service and cleaning recommended every 6 months.
Slightly and Moderately Hard, service and cleaning recommended every 4 months.
Hard and Very Hard, service and cleaning recommended at least every 2 months.
if it is well water, analyse and balance the water to achieve better performance.
1 German degree 1 ppm of
CaCO3
1.00 17.8
0.056 1.00
0.798 14.3
0.560 10.0
Hardness
(mg/L - ppm)
0-50
50-100
100-150
150-200
200-300
> 300
18
1 English degree
1.25
0.0702
1.00
0.702
Hardness
(French degrees)
up to 5
up to 10
up 15
up to 20
up to 30
> 30
1 French degree
1.78
0.1000
1.43
1.00