Vian Hot Tub Non Chlorine Shock

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.