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If the calcium hardness of your spa water is less than 100mg/L it should be increased. AquaSPArkle Spa Hardness Plus is an effective product used for increasing calcium hardness levels within your spa water.
Aquasparkle Spa Hardness + Calcium Plus Increaser 1kg
Sale price
£11.99
Regular price
£14.99
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| Spa Volumes | To increase Calcium Hardness | |||
|---|---|---|---|---|
| Litres | Gallons | 10mg/L | 25mg/L | 50mg/L |
| 500 | 110 | 7g | 19g | 38g |
| 1000 | 220 | 15g | 38g | 76g |
| 1500 | 330 | 23g | 57g | 114g |