Alkalinity first, then pH
Total alkalinity acts as a buffer that holds pH steady. If alkalinity is low, pH will bounce around no matter how much acid or buffer you add. Get alkalinity into range first and pH becomes much easier to hold.
What high pH costs you
High pH makes chlorine sluggish, so you use more of it for less result. It also encourages cloudy water and scale on surfaces, salt cells and heaters.
What low pH costs you
Low pH is corrosive. Over time it attacks pool surfaces, metal fittings, heater components and pump seals, and it can make eyes and skin sting.
Adjust in steps
Add chemicals in measured doses with the pump running, then retest after the water has circulated. Chasing a number with big doses usually overshoots and costs more to correct.
Want us to take care of it?
Our technicians look after pools and spas across Bunbury, Busselton, Dunsborough and the South West.
Related advice
- Water chemistryHow often should you test your pool water in the South West?A simple weekly and monthly testing routine that suits Bunbury summers, plus what to bring into the shop for a full water test.
- Pumps, filters & equipmentLooking after your filter, pump and chlorinatorWhat filters and salt cells actually need, the early warning signs of a fault, and why a blown fuse is sometimes the whole problem.