CHLOR Cal Hypo Concentrated Chlorine Granules


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Concentrated chlorine granules for shock dosing swimming pool water, to kill bacteria and breakdown organic contaminants. A highly effective oxidising biocide giving excellent biological control at low dose rates.


Physical state White/offwhite granules
Odour Distinctive chlorine odour


Test the pool water with a suitable test kit to determine chlorine levels. To increase the chlorine level by 1mg/litre (ppm) add 150g shock granules per 100m³.

For weekly shock dose add shock granules to raise the chlorine level to between 6-10 mg/litre (ppm).

A weekly shot dose is recommended to remove algae and bacteria and prevent any build up of resistant strains.

Chlorine test kit is available to determine correct levels in the system (WTP TK115, 0-5ppm).


Use biocides safely. Always read the label and product information before use.

Dissolve the Shock Granules in water in a plastic bucket. Add solution to the pool water near return inlets.

Handling and Storage

WTP CHLOR CAL HYPO should be stored in black containers and exposure to sunlight should be kept to a minimum. WTP CHLOR CAL HYPO should not be stored with organic materials and acids.  Please refer to Material Safety Data Sheets for detailed handling and storage information.

Potential Hazards

Please refer to safety data sheet for detailed handling/storage instructions.

Contact with acids liberates toxic (R31) chlorine gas.


WTP CHLOR CAL HYPO treatments are shipped in 5 kg, and 10 kg and 25kg UN pails.


Field Representatives will work closely with customer personnel to assure the effective application of the water treatment programme. Qualified personnel can provide regular service calls.  

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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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