20
Water hardness table
Level | Type |
| Water hardness |
| ||
°dH | °T.H. | mmol/l | Clarke | |||
|
| |||||
1 | soft | |||||
2 | medium | |||||
3 | hard | |||||
4 | very hard | > 21 | > 37 | >3.7 | >25 | |
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|
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|
20
Water hardness table
Level | Type |
| Water hardness |
| ||
°dH | °T.H. | mmol/l | Clarke | |||
|
| |||||
1 | soft | |||||
2 | medium | |||||
3 | hard | |||||
4 | very hard | > 21 | > 37 | >3.7 | >25 | |
|
|
|
|
|
|