Shock Chlorine Granules – Fast-Dissolving Pool Shock Treatment – Kills Bacteria & Algae – Crystal-Clear Water – Ideal for Swimming Pools, Hot Tubs & Spas – 2 x 1 Kg

Dissapointed that it doies not fully disolve even in very hot water when mixed. Hence as I know that chlorine will stain white if laying on a surface the only answer is to either poor directly into filter so it stay there or not pour the dreges out.yes as others point out whilst a shock treatment it also suggests using it for normal use at a lower quantity. I would not buy again

DO NOT buy this product for Vinyl/PVC non permanent swimming pools. The granules in our case took the Blue finish off the pool bottom turning it White (see picture) ruining it. The seller says the crystals should be pre disolved for small pools, however there are no such warning instructions on the granules container or any separate instructions that come with product.

This is what the product has done to my brand new pool.Pool is 9.150m³, correct amount used for shock treatment used, 91.5g. Dissolved I'm a bucket of pool water as it should be and this is the result. Its eaten through the bottom of the pool. That's me over a grand down with everything I've bought for a pool that is now unusable.

This product is rubbish it does not dissolve in any instance. Have even left it over night to try and dissolve and it still doesn’t work. Avoid

It worked, raised the chlorine level overnight.

Just purchased a hot tub and needed chemicals. Checked local stores and not available so decided to see what was on line.the purchase I made seemed value but thought delivery charge could have been less? otherwise no problems.

Great for spa's or hot tubs to control the ph levels