Relax Spa Hot Tub Chlorine Shock (500ml)
70% Shock Chlorine Granules
Deep Blue Pro Granular Shock is a powerful calcium hypochlorite shock treatment containing approximately 70% available chlorine. Designed to tackle pool water problems such as algae and help restore clear, sparkling water.
It can be used as a regular shock or oxidising treatment and is particularly useful following heavy pool use or after periods of warm or unsettled weather.
Key Features
Approximately 70% available chlorine
Calcium hypochlorite granules
Powerful shock treatment for swimming pools
Effective against algae and other pool water contaminants
Suitable for restoring problem water
Can be used for regular shock or oxidising treatments
Suitable for use through the pool's circulation system
Application Instructions
Maintain the pool pH between 7.2–7.6. Adjust if necessary before treatment.
Maintain routine free chlorine levels between 1–3 mg/l (ppm).
Shock or oxidising treatments can be carried out weekly or fortnightly as required, with a maximum shock level of 10 mg/l (10 ppm).
Pre-dissolve the granules in a clean plastic container at a maximum rate of 100g per 10 litres of water. Always add the product to the water — never add water to the product.
Stir thoroughly until completely dissolved, then add the solution to the pool with the pump running, preferably near the water inlets to aid distribution.
Pool water may temporarily become cloudy following treatment. Continue filtration until the water clears.
Allow the chlorine level to fall below 5 ppm before swimming and wait at least 30 minutes following treatment.
Dose Rates
Pool Volume | Increase by 1 ppm | Increase by 5 ppm | Increase by 10 ppm |
4,545 litres / 1,000 gallons | 7g | 35g | 70g |
11,360 litres / 2,500 gallons | 17g | 88g | 175g |
22,700 litres / 5,000 gallons | 35g | 175g | 350g |
45,450 litres / 10,000 gallons | 70g | 350g | 700g |
68,175 litres / 15,000 gallons | 105g | 525g | 1,050g |
Important Safety Information
Wear suitable gloves, protective clothing and eye/face protection when handling.
Never mix this product with other chemicals, cleaning products or chlorine products.
Do not add the product to a skimmer basket containing chlorine tablets or other chemicals.
Always add the granules to water when pre-dissolving.
Handle in a well-ventilated area, preferably outdoors.
Keep the product dry and store in a cool, dry place.
Keep locked away and out of reach of children.
Avoid contact with acids, as this can release toxic gas.
Do not allow the product to enter the environment.
Always read the product label and safety information before use. Use biocides safely.