Alkalinity for spa - Spa alka minus
Alkalinity for spa - Spa alka minus
Alkalinity for spa - Spa alka minus
Alkalinity for spa - Spa alka minus

Alkalinity for spa - Spa alka minus

Regular price
$13.17
Sale price
$13.17
Sale
0% off
Regular price
$13.17

Ajustez facilement l’équilibre de votre eau avec ce réducteur de pH et d’alcalinité spécialement conçu pour les spas. Sa formule liquide à dissolution immédiate agit rapidement sans laisser de dépôts, pour une eau stable, confortable et prête à l’utilisation.

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SKU: 35722
Format: 900 ml (New design)

Availability

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In-store availability
71 In stock at 04 Laval 71 In stock at 04 Laval Sold out at 04 Laval

Easily adjust your water's balance with this pH and alkalinity reducer specially designed for spas. Its immediately dissolving liquid formula acts quickly without leaving deposits, for stable, comfortable, and ready-to-use water.

Features

  • Effectively reduces water pH and alkalinity

  • Fast-acting, residue-free liquid formula

  • Allows for precise parameter adjustment

  • Improves bather comfort

  • Compatible with regular spa maintenance

  • Swimming possible quickly after addition

  • Size: 900 ml

900ml format

Main Actions: Adjust alkalinity
Product Category: Balancing Products
Forms: Liquid
Application Method: To pour directly into the water
Water Balance: Alkalinity too high
Safety and Storage: Add granules to water, never the reverse, Follow the manufacturer's instructions, Store away from cold, Store away from heat, Store in a cool, dry place, Use appropriate protective equipment, Avoid contact with skin, Keep out of reach of children and animals, Protect eyes
Treatment Time: 30 min to 1 h
Basin Type: Spa

PRECAUTIONS:

HARMFUL CONTENT. CAUSES BURNS. RELEASES DANGEROUS FUMES WHEN MIXED WITH OTHER PRODUCTS. Keep out of reach of children. Do not mix with other chemicals. Do not ingest. Avoid contact with eyes, skin, and clothing. Do not breathe fumes. Handle with care. Wear rubber gloves and safety glasses when handling this product. Use only in a well-ventilated area.

FIRST AID:

Contains organic acid. If swallowed: Immediately call a poison control center or doctor. Do not induce vomiting. If in eyes: Rinse with water for 15 minutes. If on skin: Rinse thoroughly with water. If on clothing: Remove clothing. If inhaled: Move exposed person to fresh air.

WASTE DISPOSAL:

Rinse empty containers with cold water and recycle packaging where a recycling program exists. Any unused or unwanted product should be taken to an authorized waste treatment facility for disposal.

Delivery is free for chemicals and small accessories with purchases of $50 or more. A $10 fee applies to orders under $50. We deliver quickly across Canada for this item.

The spa must be running when the product is added. Wait 15 minutes and recheck the pH and alkalinity.

Key Characteristics

Important role

Stabilizes pH by acting as a shield (buffering effect), preventing sudden and uncontrolled variations in acidity levels.

Simple and effortless

A concentrated formula that can be used in two simple steps: calculate and pour.

Formidable efficiency

Its high concentration guarantees maximum efficiency for rapid water treatment.

Peace of mind

A certified product, tested in real conditions, for uncompromising maintenance.

How to use - Alca Minus

This video guides you step-by-step on how to use Alca Minus simply and effectively. This balancing product is designed to decrease the total alkalinity of spa water while slightly lowering the pH, in order to maintain a stable balance and prevent unwanted water fluctuations.

How to use the product:

  • Add 60 mL of Alca Minus per 1000 L of spa water to decrease the pH by approximately 0.4 and the alkalinity by approximately 14 ppm.
  • Pour the product directly into the spa water while the spa is in operation.
  • Wait approximately 15 minutes, then check the pH and alkalinity again.
  • Repeat the operation as needed until the appropriate values ​​are obtained.

How to Properly Balance Your Spa Water?

Discover the right habits to adopt, the mistakes to avoid, and our practical tips for maintaining perfect balance throughout the season. Whether you’re a new spa owner or experienced, this video will help you simplify maintenance and extend the life of your equipment.

GUIDE

How to properly balance your spa water

Well-balanced water ensures comfort, performance, and long-lasting protection for your spa. Follow our guide to understand each parameter and achieve flawless results.

View the guide

FREE spa maintenance course

A simple, hands-on course to better understand spa maintenance and enjoy a worry-free experience all year long. (Taught in French)

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FAQ



To lower excessively high alkalinity in a spa, use an "Alka-minus" product or an alkalinity reducer. Add a small amount of the product near a jet, with the pump running, and let the water circulate for 20 to 30 minutes before testing again. Excessive alkalinity can raise the pH, make the water cloudy, and reduce the effectiveness of sanitizers like chlorine and bromine. Always correct alkalinity gradually to avoid lowering the pH too much.

Consult our products, Consult our products, Consult our products, and Consult our alkalinity regulators



To increase the alkalinity of a spa, you need to use a product designed to raise it, often called “Alka+”, “alkalinity booster”, or “alkalinity plus”. Add the product directly to the spa water, according to the recommended dosage based on the spa's volume. The ideal alkalinity is between 0 and 150 ppm and acts as a buffer to stabilize the pH. When the alkalinity is too low, the pH becomes unstable and fluctuates constantly. After adding the product, circulate the water for 20 to 30 minutes, then retest to confirm the reading.

Consult our products, Consult our products, Consult our products, and Consult our alkalinity regulators


The pH indicates whether the water is acidic or basic on a scale of 0 to 14 (7 = neutral). In a spa, the ideal range is 7.2 to 7.8: it maximizes comfort (less eye/skin irritation), maintains good disinfectant effectiveness (chlorine or bromine), and preserves the equipment. A pH that is too low makes the water corrosive and irritating; a pH that is too high promotes scale, turbidity, and reduces the action of the disinfectant.


Total alkalinity is the buffering capacity of water: it stabilizes pH and prevents sudden changes. The target in spas is 100–150 ppm. Below this, pH becomes unstable and the water can become aggressive to surfaces and metals; above this, pH becomes difficult to lower and cloudiness/scale may appear.


To adjust the alkalinity of a spa, you must first measure the current level using a test kit or test strips. If the alkalinity is too low, add an alkalinity booster; if it is too high, use an Alka Minus product. The goal is to achieve a value between 100 and 150 ppm, which stabilizes the pH and improves the effectiveness of chlorine or bromine. Proper alkalinity makes the water more comfortable, reduces pH fluctuations, and protects spa components from corrosion and scale buildup.

  • Then aerate (jets/bubbles) to raise the pH without raising the total alkalinity too much.
  • Re-test and repeat in stages.
  • Symptoms of total alkalinity outside the range:
  • Too low (<100 ppm) → unstable pH, “aggressive” water, risk of corrosion, irritations.
  • Too high (>150 ppm) → pH difficult to lower, cloudy water, limescale deposits.
  • Tip: Adjust only one product at a time, follow the label, and respect the balancing order: total alkalinity → pH → hardness.
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Low pH in a spa often makes the water feel “aggressive.” You may notice eye and skin irritation, a stronger chemical smell, and even early signs of corrosion on metal components or spa equipment.

On the other hand, high pH usually leads to cloudy water, calcium deposits on the spa surfaces and jets, and reduced effectiveness of your sanitizer (chlorine or bromine). In both cases, the water becomes less comfortable and harder to balance, which signals that it’s time to correct the pH.


  • pH stability: alkalinity “buffers” the pH. Too low = pH roller coaster; too high = pH difficult to lower.
  • Problem prevention: Correct alkalinity limits corrosion, turbidity and scaling.
Consult our products, Consult our products, Consult our products, and Consult our alkalinity regulators



The ideal pH for a spa is generally between 7.2 and 7.6. Within this range, the water is more comfortable for the skin and eyes, the sanitizer (chlorine or bromine) works effectively, and the spa equipment is better protected against corrosion and scale buildup. A well-balanced pH is the foundation of good water quality in a spa.

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