Hardness Increase 1KG
- To increase the calcium hardness of your Spa water.
- Too little Calcium in you spa water can cause surface damage to pool surfaces, but too much causes scaling. Various "ideal" Calcium levels are quoted by pool equipment manufacturers and you should seek their guidance.
- These are likely to be in the range of 100 to 500 parts per million.
- Similar to: Spa Guard Balance Pak 300, Spa Hardness plus
- Contains: Calcium Chloride.
- £1.00 extra carriage will be added to your basket at checkout
Hardness is the measurement of calcium salts in the water and this will vary depending where you live. Low levels occur in soft water, High levels of calcium hardness occur in areas of hard water.
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