HTH chlorine sticks 300gr | 4.5kg

69,95 €
  • Inorganic chlorine sticks from HTH
  • No over-stabilisation possible
  • Permanent chlorination
  • Slow dissolving
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Need to know

  • Inorganic chlorine sticks from HTH
  • Calcium hypochlorite
  • No over-stabilisation possible
  • Permanent chlorination which destroys bacteria, viruses, fungi and algae in swimming pools
  • Slow dissolving
  • No contact: wrapped sticks
  • Use biocides safely. Before use, read the label and product information.


The HTH chlorine sticks disinfect the pool water. HTH tablets combat bacteria, viruses, fungicide and algae and are suitable for private swimming pools.


  • Slowdissolving
  • Permanently available chlorine content of at least 65%
  • Free of cyanuric acid: no danger of overstabilisation
  • Suitable for use on any filter system
  • Separately packed sticks
  • Minimum impact of pH level
  • Dissolve completely leaving no residue

These 300-gram chlorine sticks contain non-stabilised or inorganic chlorine. Therefore, you should not use this chlorine in combination with other chlorine products.

The cylindrical chlorine sticks from HTH have a unique patented plastic covering. This prevents you from coming into direct contact with the chlorine stick.

Furthermore, it prevents the chlorine tablet from dissolving too quickly. The chlorine dissolves gradually, ensuring longer and more efficient chlorination of the pool.

Conventional disinfection with chlorine not only has a bactericidal effect, it also removes non-filterable organic impurities by means of oxidation. Conventional disinfection with chlorine is still the most reliable option, especially if water pollution is particularly high (e.g. at temperatures above 28°C or from severe pollution). 

HTH chlorine is calcium hypochlorite and is also called inorganic chlorine or non-stabilised chlorine. HTH chlorine has the highest concentration of active chlorine on the market (at least 65%) and does not contain any inhibiting stabilisers. The purpose of stabilisers is to slow down the breakdown of the active chlorine by the sun; however, they block the operation at excessive concentrations.

A known problem with frequent use of the typical 200-gram chlorine tablets is that the pool water becomes over-stabilised with cyanuric acid (stabiliser). This causes the disinfection process to be blocked, with the risk of green water. HTH chlorine products do away with this problem and the chlorine is always actively available. 

Technical Specifications

Weight per tablet
300 grams
15 tablets per container
Type of chlorine
Inorganic chlorine
Calcium hypochlorite (65% minimum)
Belgian authorisation number
Dutch authorisation number


Do not mix with any other product. Do not dissolve for use.

  • Always read the safety instructions first.
  • Compatible with salt chlorinator
  • Never remove the plastic packaging around the product
  • Check that the filter is working.
  • Set the pH level to between 7.0 and 7.4 pH.
  • With a covered swimming pool, maintain a stabiliser level of between 25 and 50 mg/l.
  • The sticks are designed to be placed in the skimmers.
  • Check chlorine content before allowing swimming. If the content of active chlorine in the water is more than 4 mg/l, do not allow anyone to swim in the water.
  • Add 1 stick per 20m³ of water every 4 to 5 days.


  • Never pour water over the product, the product reacts violently with a little water.
  • Stability of the product is ensured when stored in a dry, ventilated place.

Where to buy?

You can buy the HTH chlorine sticks here :

  •     buy HTH sticks in our online shop Swimmingpool.Be
  • you can also buy or pick up the chlorine sticks from HTH in our three swimming pool shops
    • the swimming pool shop in Oudenaarde
    • swimming pool shop in Overijse
    • and the store in Schoten
  • finally, you can buy the HTH chlorine sticks in our new lifestyle shop
Need advice?
Do you have a question about this product? Don’t hesitate! Our customer service team is ready to help you further.
69,95 €