Simply Watercare - Hardness Plus 5KG

Add this product to your pool or spa when you need to increase your calcium hardness level. To increase your level add 15g per 1000 litres of water, make sure you have your jets running, add the measured amount you need to a bucket of water and pour into the water. Do not allow anyone into pool or spa when pour this chemical into the water and wait 30 minutes before using the pool or spa. The water will cloud over whilst added this chemical for a small period of time. Avoid skin and eye contact.