8 Pool Water Chemistry Tips That Actually Work (2026)
Unbalanced pool water causes cloudy water, scale, corrosion and wasted chemicals — and the math is genuinely confusing. These 8 field-tested tips cut straight to what makes the biggest difference for pool owners and service technicians — and at the end you will find a free app that makes following them effortless. 1. Test 2–3 times a week in peak season, weekly off-season. 2. Always balance pH and alkalinity before adjusting chlorine. 3. Keep CYA (stabiliser) between 30–50 ppm — too high weakens chlorine. 4. Add chemicals to water, never water to chemicals. 5. Run the pump while dosing and for a few hours after. 6. Aim for an LSI between -0.3 and +0.3 to avoid scale and corrosion. 7. Shock after heavy use, rain or a heatwave. 8. Brush the walls weekly — chemistry is not a substitute for circulation. Put These Tips on Autopilot Knowing the tips is half the battle — doing them consistently is the other half. Pool Chemistry Pro keeps the routine, does the calculations and reminds you what is next, so good habits stick. ...