surespa Spa Shock Express - 500g

You should use a shock as soon as your water starts to look a little dull or foamy and immediately after very heavy use.  You should also shock your tub at each water change.

Dosage: Measure approximately 35g of shock per 1500 litres of hot tub water using the 10g measuring spoon, included in the pot. (The equivalent of 3-4 scoops). Sprinkle the powder over the surface of the water, but be careful not to breath in the substance or allow anyone to get it in their eyes. Then run the pumps for at least an hour with the cover off.

Each pot contains sufficient for at least 14 treatments

NB: surespa Spa Shock Express contains chlorine. Chlorine shocks are far more effective than the non-chlorine alternative and most of the excess chlorine will gas-off whilst the cover is off and the pumps are running. However, you should not use this product if you are significantly allergic to chlorine.