Chlorine Shock (Calcium Hypochlorite Granules)

[SP152-2.5]    Pack size - 2.5 Kg

£14.99

Chlorine Shock (Calcium Hypochlorite Granules)
Chemical: Calcium Hypochlorite
Function: A granular form of chlorine shock treatment for larger volume pools that are not emptied on a regular basis. Can also be used as a chlorine sanitiser for indoor pools.

We recommend that you only buy sufficient chlorine shock to last one season. The reason is that the chlorine gradually attacks the plastic materials it is packaged in making them brittle and weak.

Dosing Instructions (Pool: Shock Treatment)
  • Once a fortnight or more often in hot weather, boost your chlorine level using the shock granules.
  • Add 500 grams (1 bag) (1 scoop = 100 grams) per 10,000 gallons of pool water.
  • The granules are dissolved in a bucket of warm water and distributed around the pool or poured into the skimmer basket. Make sure your skimmer basket is free from all other types of chlorine before pouring it in.
  • If algae is present you may need to double or even treble the recommended dose.
  • Adjust the pH to between 7.2-7.6.
  • Keep the filter free of debris and allow the water to circulate overnight. Allow the available chlorine level to drop below 3ppm before entering the pool. If this takes too long excess chlorine can be removed using a chlorine reducer Dechlorinator
Dosing Instructions (Pool: Chlorine Source)
  • Add 75 grams per 10,000 gallons of pool water to increase the chlorine reading by 1 ppm.
  • The granules are dissolved in a bucket of warm water and distributed around the pool or poured into the skimmer basket. Make sure your skimmer basket is free from all other types of chlorine before pouring it in.
  • Maintain a chlorine reading of 1 to 3 ppm.
DO NOT MIX UNSTABILISED CHLORINE WITH ANY STABILISED CHLORINE AS IT WILL EXPLODE

Click here for a MSDS Sheet for this product.

by Stan Robertson on 05/06/2019

by PETER WITTE on 24/05/2019
superb product

by thomas PATTERSON on 15/05/2019

by Amanda Laloo on 01/05/2019
Works well but...Lots of extra plastic packaging which means more landfill unfortunately. Service and speed of delivery was great would have been a five but it won’t let me click on it!

by Beverley Cudd on 25/04/2019
Always works

Service review

by colin campbell on 12/06/2014
unfortunately wrong kit sent maxi received phoned and additional items sent next day
Swimming Pool Chemicals response : Many apologies for the initial error.

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