Vian Non-Chlorine Shock 1kg

Treats cloudy or green water but is also used as a weekly shock dose to restore the activity of the bromine or chlorine.

After bathing has ceased you can shock the Spa by adding 15g Non-Chlorine Shock to 1,000 litres (220galls) of spa water. Use weekly/fortnightly depending on use. If green water persists then increase dose rate to 20g to 1000 litres of spa water.

Once sanitiser levels have returned to normal bathing may resume. Always remove your cover whilst shocking your spa with this chemical for atleast 10 minutes to allow the chemical to work into the system.