HYDRO ONE pH RAISER / pH REDUCER CALCULATOR

pH Adjustment Calculator

Calculate an estimated staged dose of Hydro One pH Raiser or Hydro One pH Reducer for your pool based on your pool water volume and your measured pH. This calculator is calibrated only for these two Hydro One products.

Estimated dosage only. Actual pH response varies with total alkalinity and other water conditions. Verify all test results, follow the chemical manufacturer's label and Safety Data Sheet, add chemicals separately, dose in stages, circulate thoroughly and re-test before further addition. The user is responsible for safe and appropriate chemical handling and application.

1 Pool & Water Readings

2 Recommendation

Step 1: Pool Size & Water Readings

Enter your pool's internal measurements in metres and your latest pH (and, if available, total alkalinity) test results.

Length (m)

Measurement in metres

Width (m)

Measurement in metres

Average Water Depth (m)

Average water depth

Total Water Volume

0 litres

Current pH

From your digital pool testing kit.

Target pH

Recommended operating band: 7.2–7.6.

Total Alkalinity (ppm, optional)

Leave blank if not tested. Normal range: 60–180 ppm.

I understand that this calculator provides an estimated starting dosage only. I will verify the pool-water test results and follow the selected Hydro One product's instructions and safety requirements before application.

Formula: Length × Width × Average Depth × 1,000 = litres

Suggested First Treatment

An estimated starting dose only — always verify test results and follow the product label.

No adjustment needed

0 g

Suggested first-treatment dose (estimate)

Pool Volume0 L

Current pH—

Target pH—

Full Theoretical Dose—

Remaining After First Treatment—

Total AlkalinityNot entered

Application instructions

Use only the selected Hydro One pH product — do not substitute another brand.
Add only the suggested first-treatment quantity initially.
Keep pH products separate from chlorine and all other pool chemicals — never mix them together.
Ensure adequate circulation while dosing and afterwards.
Monitor and re-test over 24–48 hours before adding any remaining quantity.
Do not add the remaining theoretical quantity automatically — reassess after re-testing.
Contact Hydro One Pool Support for extreme readings, unusual dose quantities, or uncertain results.

Key Information

Hydro One pH Raiser is used when your current pH is below your target.
Hydro One pH Reducer is used when your current pH is above your target.
Recommended operating band: pH 7.2–7.6, with a default target of 7.4.
Staged dosing: only the first 50% of the estimated full dose is recommended initially, to reduce the risk of overshooting.
Total alkalinity strongly affects pH response. Readings below 60 ppm or above 180 ppm reduce the reliability of the estimate.
Extreme readings (below pH 6.8 or above pH 8.2) should be verified and reviewed with Hydro One Pool Support before dosing.

Full disclaimer

This calculator provides an estimated starting dosage for swimming-pool pH adjustment based on the information entered by the user. The result is for general guidance only and is not a substitute for on-site water testing, professional assessment, the chemical manufacturer's label, Safety Data Sheet, or applicable regulations.

Actual chemical demand and pH response may vary materially due to total alkalinity, cyanuric acid, borates, calcium hardness, temperature, source-water chemistry, contamination, circulation efficiency, test accuracy and other buffering conditions. Hydro One does not warrant that the calculated quantity will achieve the selected target pH in every pool.

Before dosing, verify the pool volume, current pH and total alkalinity using a reliable test method. Add chemicals separately and strictly in accordance with the product label. Never mix Hydro One pH Raiser, Hydro One pH Reducer, chlorine, acids or other pool chemicals. Use suitable personal protective equipment, ensure adequate circulation, add only a partial dose initially, and re-test the water before adding any remaining quantity.

The user remains responsible for confirming the suitability, dosage, handling and application of the selected chemical. Hydro One shall not be liable for personal injury, property damage, surface damage, equipment damage, water-quality imbalance, loss or expense arising from incorrect input, misuse of the calculator, improper chemical handling, or failure to follow the product instructions and safety requirements.