Enter your pool size in gallons and your test readings. Get the exact amount of each chemical to add — no guessing.
Ideal: 1–3 ppm (or about 7.5% of your CYA). Adjust chlorine last.
Ideal: 7.4–7.6. Balance alkalinity first — it controls how pH behaves.
Ideal: 80–120 ppm. Adjust this first of all.
Ideal: 200–400 ppm (plaster) or 175–225 ppm (vinyl/fiberglass).
Ideal: 30–50 ppm. Dissolves slowly — allow a few days and retest.
Track water chemistry, chemical doses, routes, and invoices for your whole pool business — on your phone, for a flat price, with no cut of your payments.
Get Pool & Spa Service Pro on Google PlayDoses assume common product strengths: liquid chlorine as labeled (6–12.5%), cal-hypo 65–73%, dichlor 56%, muriatic acid 31.45% (with 20% and 15% options), baking soda (sodium bicarbonate) for alkalinity, soda ash (sodium carbonate) for raising pH, pool-grade calcium chloride for hardness, and cyanuric acid for stabilizer. Always check your product's label — strengths vary by brand.
Acid demand depends on your alkalinity, calcium hardness, and water temperature, so pH and alkalinity adjustments are starting points, not exact guarantees. Add about two-thirds, run the pump, and retest before adding more. For lowering alkalinity, add the acid in one spot in the deep end with the pump off, then run the pump and aerate to bring pH back up.
There's no chemical that removes calcium or cyanuric acid from pool water. The only practical way to lower them is to drain part of the pool and refill with fresh water. This calculator shows how much water to replace.
This tool gives starting-point estimates for standard pool chemicals based on your pool volume and readings. It is not a substitute for testing. Always test your water with a reliable kit before and after dosing, follow product label directions, and handle chemicals safely.