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.
Frequently Asked Questions
What is the ideal pH for a pool?
7.4–7.6. Below 7.2 is corrosive; above 7.8 causes scale and cloudy water.
How do I lower high chlorine fast?
Stop adding chlorine, run the pump and let sunlight burn it off; a small neutraliser dose works if you need the pool sooner.
What does LSI tell me?
Whether your water is scale-forming (positive) or corrosive (negative). Aim near zero.
How much acid to lower pH?
It depends on volume and current alkalinity — the dosing calculator gives the exact amount.
Why is my water cloudy despite chlorine?
Often high pH, high CYA locking up chlorine, or poor filtration. Check every parameter together.
Is the app free?
Yes — all calculators and logging are free, with an optional ad-free Pro upgrade.