Three readings are managed by spa balancers: pH, total alkalinity (TA) and calcium hardness. Keeping each within target supports sanitiser performance, user comfort and a shell without scale.
Pairs each out-of-range reading with the Zagosa Spa & Pool balancer that corrects it. The adjustment order is total alkalinity, then pH, then calcium hardness.
| Test reading | Balancer | Target |
|---|---|---|
| pH above 7.6 | pH & Alkalinity Reducer (sodium bisulphate) | pH 7.2 to 7.6 |
| pH below 7.2 | pH Plus (sodium carbonate) | pH 7.2 to 7.6 |
| Total alkalinity below 80 ppm | Total Alkalinity Increaser (sodium bicarbonate) | 80 to 120 ppm |
| Calcium hardness below 150 ppm | Calcium Hardness Increaser (calcium chloride flakes) | 150 to 250 ppm |