Relax Spa 500g Hardness Plus
500g Relax Spa Hardness Plus
Your spa water needs to contain a Calcium Hardness of between 200 parts per million (ppm) and 300 ppm
Low Calcium (soft water) will cause expensive damage to your spa equipment
This is particularly important if your tap water is soft water (low in Calcium)
Test the Calcium Hardness immediately after you have drained and refilled your spa water and at least once per week
£4.95
In stock
In stock