You enter your pool volume in gallons, the current and target chlorine levels in ppm, and the current and target pH. The tool applies standard dosing factors — 0.0073 oz of liquid chlorine per gallon per ppm for chlorine, and 0.0013 oz per gallon per 0.1 pH unit for pH adjustment. Alkalinity dosing assumes a fixed rate of 1.2 lbs of baking soda per 10,000 gallons per 10 ppm increase. Results are estimates; always retest after adding chemicals.
Most health departments recommend 1–3 ppm of free chlorine for residential pools. Higher levels (up to 5 ppm) are safe for swimming but may cause eye irritation. Levels below 1 ppm are generally too low to sanitize effectively.
Adjust pH first. Chlorine works most effectively in the 7.2–7.6 pH range. If pH is too high, chlorine loses much of its sanitizing power, so any chlorine you add will be partially wasted.
For rectangular pools: length × width × average depth × 7.48 gives gallons. For round pools: diameter × diameter × average depth × 5.9. If you are unsure, check your pool builder's documentation or use a pool volume calculator.
No. Add one chemical at a time, run the pump for at least 15–30 minutes, and retest before adding the next. Mixing chemicals in the pool water simultaneously can cause dangerous reactions or cancel each other out.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.