Chlorine Shock (Calcium Hypochlorite Granules)

[SP152-1]    Pack size - 1 Kg

£7.99

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 John Warman on 18/09/2018
Nice touch being packed in separate half kilo bags.

by William Airey on 21/08/2018
I used these chemicals to kill the algea in my splasher pool. It worked over night & the water is now clear again. Excellent.

by Roy James on 14/07/2018
Only because you were out of stock what I ordered. This was the expensive alternative.

by 102 brown on 10/07/2018

by Sheila May on 23/06/2018
Good value for money

Service review

by gaynor lawlor on 22/06/2016
took 5 days for products to arrive
Swimming Pool Chemicals response : We are very sorry about this Gaynor. We will speak to our Yodel account manager regarding this.

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