Duration extra HTH 10 KG chlorine tablets
Duration extra HTH 10 KG chlorine tablets

Duration extra HTH 10 KG chlorine tablets

$114.99
$114.99
0% off
$114.99

Keep your pool clean and clear all season long with Chlore Duration Extra HTH. Formulated to release active chlorine gradually, these tablets are designed to effectively combat bacteria and algae while maintaining a perfect water balance. With its high concentration of active chlorine, this product is ideal for easy, long-lasting pool maintenance, without the need to add stabilizers.

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SKU: 38120

Availability

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HTH Duration Extra chlorine tablets are designed to ensure continuous and effective disinfection of your pool water. Thanks to their slow dissolution, they gradually release active chlorine to eliminate bacteria, algae, and contaminants while maintaining clear and balanced water. Their unstabilized formula prevents the accumulation of cyanuric acid in the water, making them an excellent choice for pools that are already stabilized or for regular maintenance without the risk of over-stabilization.

Features

  • Slow-dissolving chlorine tablets for gradual and constant disinfection
  • Concentrated formula containing 65% active chlorine
  • Unstabilized product, without cyanuric acid to avoid over-stabilization of the water
  • Effectively eliminates bacteria, algae and organic contaminants
  • Contains a stain and limescale inhibitor to help preserve water clarity
  • Economical 10 kg pack, ideal for regular pool maintenance
  • Compatible with above-ground and in-ground pools
  • Type: Unstabilized chlorine tablets
  • Active chlorine content: 65%
  • Format: 10 kg
  • Application: Continuous disinfection of swimming pool water
Main Actions: Disinfect
Product Category: Sanitizers
Dissolution: Slow
Forms: Tablets
Application Method: To be placed in a floating dispenser
Usage Period: Weekly
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
Chlorine Stabilization: Non-stabilized
Basin Type: Pool

Add the tablets according to your pool's chlorine demand to maintain a free chlorine level between 1 and 3 ppm.

The slow dissolution allows for continuous treatment over several days, reducing the frequency of product addition.

To maintain perfectly balanced water, it is recommended to perform a shock treatment once a week, particularly during periods of high heat, after heavy rain or after intensive use of the pool.
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.

Add the tablets according to your pool's chlorine needs to maintain afree chlorine level between 1 and 3 ppm.

Slow dissolution allows forcontinuous treatment for several daysreducing the frequency of product addition.

To maintain perfectly balanced water, it is recommended to carry outa shock treatment once a weekparticularly during periods of high heat, after heavy rain or after intensive use of the swimming pool.

Key Characteristics

Multi-function action

Disinfects water, helps prevent algae growth and improves water clarity thanks to its clarifying effect.

Concentration

Concentrated formula containing 65% active chlorine

Disinfection power

A high concentration of active chlorine that effectively eliminates bacteria, algae and contaminants for clean and safe water.

Product effectiveness

Product designed to effectively destroy bacteria such as algae and ensure healthy and safe water.

Without stabilizer

Unstabilized product, without cyanuric acid to avoid over-stabilization of the water

Compare options

Chlorine tablets for swimming pools duration HTH extra
Chlorine tablets for swimming pools duration HTH extra
HTH Duration Extra chlorine sticks help maintain clean and disinfected pool water thanks to the gradual release of active chlorine. Their slow dissolution ensures continuous treatment that helps eliminate bacteria, algae, and organic matter throughout the season.
Read more Read less
  • 65% active chlorine – Concentrated formula providing effective disinfection to maintain clean and safe pool water.
  • Slow-dissolving chlorine sticks – Convenient format designed to release chlorine gradually and ensure continuous water treatment.
  • Gradual release – Diffuses chlorine gradually to effectively eliminate bacteria, algae and organic matter.
  • Complete disinfection – Helps maintain clear, healthy and well-balanced water throughout the season.
  • Easy to use – Available in 10 kg and 18 kg sizes, ideal for regular maintenance of above-ground and in-ground pools.
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HTH Extra multi-purpose chlorine pucks 6 kg
HTH Extra multi-purpose chlorine pucks 6 kg
HTH Extra Multi-Function Chlorine Washers are a highly effective product for pool maintenance and purification. These chlorine pucks are designed to offer an all-in-one solution, acting as an algicide, disinfectant and water clarifier. Thanks to their certified 85% chlorine content, they guarantee fast, long-lasting action to eliminate bacteria, prevent algae growth, and protect water from the effects of the sun. This product helps maintain healthy, crystal-clear water while extending the life of chlorine.
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  • 85% active chlorine – Highly concentrated formula ensuring powerful disinfection to maintain clean and safe pool water.
  • Slow-dissolving chlorine tablets – Release chlorine gradually to ensure continuous water treatment.
  • Gradual release – Allows for prolonged action that effectively eliminates bacteria, algae and organic impurities.
  • Stabilized multi-function formula – Disinfects, acts as an algaecide and clarifies water while protecting chlorine from UV rays.
  • Simple to use – Convenient 6kg size, ideal for regular maintenance of above-ground and in-ground pools.
$49.99
$49.99
$49.99
Duration extra HTH 10 KG chlorine tablets
Duration extra HTH 10 KG chlorine tablets
Keep your pool clean and clear all season long with Chlore Duration Extra HTH. Formulated to release active chlorine gradually, these tablets are designed to effectively combat bacteria and algae while maintaining a perfect water balance. With its high concentration of active chlorine, this product is ideal for easy, long-lasting pool maintenance, without the need to add stabilizers.
Read more Read less
  • 65% active chlorine – Concentrated formula providing effective disinfection to maintain clean and safe pool water.
  • Slow-dissolving chlorine tablets – Gradually release chlorine to ensure continuous and consistent disinfection.
  • Unstabilized formula – Cyanuric acid free, ideal for avoiding over-stabilization of water and better controlling chemical balance.
  • Complete disinfection – Effectively eliminates bacteria, algae and organic contaminants for clear, healthy water.
  • Simple to use – Compatible with above-ground and in-ground pools, economical 10kg size ideal for regular maintenance.
$114.99
$114.99
$114.99

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FAQ


Chlorine must be stored in a dry, well-ventilated, cool place, away from any source of moisture. Never store it in an enclosed, unventilated space such as a damp basement or garage, or near other chemicals (acids, solvents, fertilizers). Keep it in its original container, away from flames, metal, and animals.



Yes, they can be used together, as they have complementary functions: chlorine disinfects and algaecide prevents algae growth. However, they should never be mixed in the same container; add them separately to the pool with the pump running.



Chlorine is not harmful in normal doses, but it can dry out the skin, especially for sensitive individuals. A shower after swimming helps to remove residue and moisturize the skin.



When used correctly, it is safe. However, if handled incorrectly, it can irritate the eyes, skin, or respiratory system. Never mix chlorine with other chemicals and always handle it with dry hands.



Yes, chlorine can lighten or weaken textile fibers, especially if clothes are exposed to a high concentration or left to soak. Dark-colored and cotton swimsuits are the most susceptible.



Properly balanced chlorine has almost no odor. Strong odors actually come fromchloraminesThese are byproducts formed when chlorine is lacking and reacts with impurities. Paradoxically, a strong odor often indicates a chlorine deficiency. A shock treatment quickly corrects the situation.



First, check that the salt level is within the correct range. Then, increase the cell's production. If the water is cloudy or after heavy swimming, perform a shock treatment (ideally with unstabilized chlorine). Also, clean the cell if it has calcium buildup: a dirty cell produces less chlorine.



Once in water, chlorine transforms into hypochlorous acid, a highly reactive molecule that destroys bacteria by oxidizing their cell membranes. This process is rapid and effective, even at low concentrations. This is why chlorine remains the most widely used disinfectant in swimming pools.



The simplest way is to leave the pool in the sun: UV rays naturally destroy chlorine. Use a chlorine neutralizer (chlorine destroyer) for an immediate effect. When the chlorine level exceeds 5 ppm, it's best to wait before swimming.



To raise the free chlorine level, add granular chlorine or increase the opening of the chlorinator/float. Also, ensure the pH is properly adjusted (ideally 7.2–7.6), as a pH that is too high renders chlorine almost ineffective. In hot weather or after heavy swimming, a shock treatment may be necessary to restore the level.



After regularly adding chlorine, wait approximately30 minuteswith the pump running. After shock treatment, you must wait.30 minutes to 1 hour, depending on the dose used. Always check that the chlorine isbelow 5 ppmbefore swimming.



For most residential pools, we put1 to 3 lozengesin a chlorinator or a floating dispenser. The exact amount depends on the water volume, temperature, and sunlight. The goal is to maintain1–3 ppmIf the chlorine level drops too quickly, slightly increase the float opening or add an extra tablet.



Chlorine can dry out hair and make it look paler, especially if it's already colored or damaged. However, the greenish tint sometimes seen doesn't come from chlorine, but from copper present in some waters or products. After swimming, rinse your hair and use a mild shampoo to minimize the drying effect.



No, chlorine is not flammable. However, some chlorinated products can react violently if mixed with other substances such as acids or organic matter. Therefore, chlorine should always be handled separately, with dry hands, and in a well-ventilated area.


The goal is not to add a fixed amount, but to maintain a constant level of free chlorine between1 and 3 ppmChlorine consumption varies depending on the heat, swimming, rain, and sunshine. The warmer and sunnier it is, the faster the chlorine is consumed. Test the water every day or every other day and adjust accordingly.



To apply powdered (granular) chlorine, first fill a bucket with water, then dissolve the recommended amount of product in it. Next, slowly pour the solution around the perimeter of the pool with the pump running to ensure proper distribution. Never pour the granules directly into the skimmer, as this can damage the plumbing or filter. Allow the water to circulate for at least 30 minutes, or even an hour, before swimming.



Chlorine is a disinfectant used to keep pool water clean, clear, and safe. It eliminates germs, destroys algae, and neutralizes contaminants brought in by swimmers (sweat, sunscreen, dirt). It is available in several forms: granules, tablets, liquid, or generated by a salt system. Proper chlorine management is essential to maintain healthy water and prevent odors or irritation.



Yes. Chlorine is one of the most effective disinfectants for swimming pool water. As soon as it dissolves, it forms hypochlorous acid, a molecule that quickly destroys bacteria, viruses, and microorganisms by oxidizing their cell membranes. A free chlorine level between 1 and 3 ppm ensures safe water, reduces the risk of skin and eye infections, and prevents algae growth. Well-balanced water (pH 7.2–7.6) significantly improves its effectiveness.
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