Directions for use:
Sprinkle over surface of water with pump and filter turned on
Rapid Shock will dissolve within 2-3 minutes
Spa or hot tub may be used 15 minutes after treatment
Dosage rate:
Initial dose - 75g per 1000 litres of water
Regular dose - 50g per 1000 litres of water
Frequency:
Weekly
 

Directions for use:
DO NOT use this product in indoor pools or commercial spa installations.
Dosage rate:
6 grams for every 1000L of water
60 grams for every 10,000L of water
Minimum free chlorine level:
Cold Water - 2mg/L
Water temp greater than 26degC - 3mg/L

Directions for use:
Check the water balance is within range
Pour around the perimeter of the spa with the pump running
Run the pump for one cycle
Dosage rate:
50ml for every 1000L of water
Frequency:
Weekly