Pool and Spa Water Testing

Pool and Spa Water Testing
Professional Service

Properly balanced water is essential for comfort, safety and the longevity of your pool or spa. At Piscines René Pitre, our technicians perform a complete water analysis and provide you with a detailed report along with clear, easy-to-follow recommendations.

In-store, we systematically test the four key chemical parameters required to maintain healthy water:

  • pH
  • Total Alkalinity
  • Calcium Hardness
  • Cyanuric Acid (Stabilizer)

pH: The Foundation of Water Balance

Between 7.2 and 7.8

pH is the most important parameter for swimmer comfort and sanitizer efficiency.

It measures how acidic or basic the water is.

Ideal Range: Between 7.2 and 7.8

  • To increase pH: add pH+
  • To lower pH: use pH-

Proper pH ensures soft, comfortable water, protects equipment and maximizes chlorine performance.

Alkalinity: pH Stability Control

Between 80 and 120 ppm

Alkalinity acts as a buffer that prevents sudden pH fluctuations.

It is made up of carbonates, bicarbonates and hydroxides.

Ideal Range: Between 80 and 120 ppm

  • Too low: unstable pH
  • Too high: difficult pH adjustment

Adjustments:

  • To increase: add Alkalinity Control
  • To decrease: use muriatic acid

Calcium Hardness: Protecting Surfaces and Equipment

Between 200 and 240 ppm

Calcium hardness represents the amount of dissolved calcium in the water.

Ideal Range: Between 200 and 240 ppm

  • Too high: cloudy water, scaling, stains
  • Too low: corrosion, foaming, deterioration of concrete or metal components

Adjustments:

  • To increase: Calcium+
  • To reduce: Sequa Sol or Control Cop

Cyanuric Acid: Chlorine Protection

Between 30 and 50 ppm

Cyanuric acid acts like sunscreen for chlorine, reducing evaporation caused by UV exposure.

Recommended Level: Between 30 and 50 ppm

To increase stabilizer:

Add granular stabilizer or UV Defense sticks once or twice per season.

Key Chemicals and Usage Guidelines

Algaecide
Prevention and Treatment of Algae

Algaecide<br>Prevention and Treatment of Algae

Algaecide prevents the formation and growth of algae.

Recommended Concentrations:

  • Start-up or infestation: 40% or 60%
  • Routine maintenance: 5% or 10% (40–60% may be used for stronger action)

Avoid:

  • Pouring algaecide into the skimmer (can damage filter sand)
  • Using it with a chlorinator or Duration tablets (possible chemical reaction)

Alum
Clearing Cloudy Water

Alum<br>Clearing Cloudy Water

Alum acts as a flocculant, binding particles together and settling them at the bottom of the pool.

Guidelines:

  • Use when pH is close to 8
  • Vacuum afterward using Drain or Waste mode
  • Recommended only for sand filters
  • May temporarily unbalance water; use sparingly

Calcium
Increasing Water Hardness

Calcium<br>Increasing Water Hardness

Calcium (calcium chloride) is used to help prevent corrosion.

Always dilute before adding.

Chlorine
Sanitizing and Purifying Water

Chlorine<br>Sanitizing and Purifying Water

Chlorine eliminates bacteria, algae and fungi.

When dissolved, it forms hypochlorous acid, providing effective disinfection.

Available Forms:

  • Granules
  • Tablets
  • Sticks
  • Multiple formats to suit your needs

Conclusion: Clean, Clear and Safe Water

With our complete in-store water analysis, you receive:

  • Accurate readings of your water parameters
  • Personalized recommendations
  • Professional advice for simple and effective maintenance

Your pool or spa deserves crystal-clear, perfectly balanced water. Piscines René Pitre is here to support you all season long.

FAQ – Pool and Spa Water Testing

1. Why should I have my pool or spa water tested?

Water testing ensures proper chemical balance, swimmer safety and helps prevent corrosion or calcium buildup. Balanced water also extends equipment life.

2. What parameters are measured during testing?

We measure the four essential elements: pH, total alkalinity, calcium hardness and cyanuric acid (stabilizer). These directly impact water clarity and quality.

3. How often should I test my water?

Ideally once a week during the season and after events that may affect balance such as heavy rain, high usage, chemical additions, or opening and closing.

4. Can I adjust the water myself after testing?

Yes. Your analysis report includes simple instructions and precise recommendations. Our technicians can also guide you in store.

5. What happens if my pH is too high or too low?

High pH reduces chlorine efficiency and can cause irritation. Low pH may lead to corrosion and discomfort for eyes and skin.

6. Why is alkalinity important?

Alkalinity stabilizes pH. Too low causes fluctuations; too high makes adjustments difficult. The ideal range is 80 to 120 ppm.

7. What does high or low calcium hardness mean?

Too high: scaling, cloudy water, stains. Too low: corrosion, foaming and deterioration of concrete or metal parts. The ideal level is 200 to 240 ppm.

8. What is cyanuric acid used for?

It protects chlorine from UV rays and slows its evaporation, helping maintain effective sanitation longer.

9. Is water testing free?

Yes, in-store testing is generally offered to our customers. Ask in store for details.

10. Do I need to bring a water sample?

Yes. Collect water about 45 cm (18 in.) below the surface using a clean container and bring it within one hour for accurate results.
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