Rapid dissolving granules for increasing the hardness of your water in your hot tub.
Hardness Plus increases the quantity of Ca2+ ions in water making it harder.
It has no effect on PH.
You will be able to find out your water hardness with a quick search of your location or ask your water provider.
Always follow the instructions on the product.
Please note that shipping is calculated at check out. Standard charge is £10, we offer free shipping on orders over £59.
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