Calcium Hardness Increaser – Calcium Chloride Flakes

£10.79£67.20 Inc VAT or subscribe and save up to 20%

If you’re looking to prolong the life of your spa and hot tub, then this product is for you. We know that it can be difficult balancing water levels without sufficient calcium in the system so we made sure to include enough calcium ions into our formula!

  • Helps maintain the right balance of minerals in order for the water to be clear and sanitary
  • Calcium hardness is recommended to be maintained no lower than 250ppm
  • Helps increase chemical stability
  • Reduces corrosion of equipment
  • Calcium Hardness Increaser – Available in 1kg, 5kg & 25kg

SKU: Calcium-Hardness Category:

Product Description

ClearSpa Calcium Hardness Increaser: Increase the Mineral Content in Your Spa or Pool!

Do you want to keep your spa or pool looking its best? ClearSpa Calcium Hardness Increaser available in 1kg, 5kg & 25kg can help! This product is designed to increase the mineral content in your water, making it clearer and more refreshing. ClearSpa Calcium Hardness Increaser is an easy-to-use powder that can be added to your spa or pool water. It is safe for all surfaces and will not affect the pH balance of your water.

  • If you have a pool or spa, then you know that it is important to maintain the right balance of minerals in order for the water to be clear and sanitary. The ClearSpa Calcium Hardness Increaser will help increase the mineral content of your pool by adding calcium chloride flakes which will also increase total hardness.

Why do I need the correct balance of Calcium Hardness or Total Hardness level?

  • Calcium hardness is recommended to be maintained no lower than 250ppm, If your pool or spa does not meet this requirement, then you will need to increase the Calcium Hardness levels to increase calcium content, which increases chemical stability and reduces corrosion of equipment.
  • If you are naturally in a water area that already has high total hardness levels then you don’t need calcium hardness increaser you will need a scale inhibitor instead to break down any over build-up of calcium deposits.

This product is ideal for those who want to maintain the cleanliness of their spa or pool. Order your bottle today and start enjoying the benefits of ClearSpa Calcium Hardness Increaser!  See our Full range of chemicals.

How to Use


1. Take a CALCIUM HARDNESS reading with a quality test kit. The correct reading is a minimum of 250PPM (mg/l)
2. Dose at a rate of 10g of Calcium Hardness Increaser to 1,000 liters (220 gallons) of water. Each dose will raise Calcium Hardness by approximately 10PPM (mg/l) and add no more than 50g at any one time.
3. With the circulation running, sprinkle the product directly into the water; DO NOT PRE-DISSOLVE
4. Bathing may recommence when all product has been dissolved.


• Always ensure bathers are out of the water when adding chemicals.
• Never mix with any other chemicals including cleaning products, weed killers, and chlorine products, as a dangerous reaction may occur.
• Always handle products in a well-ventilated area.
• Always wash hands thoroughly after handling chemicals.
• Store in a cool, dry, well-ventilated, secure place. Ensure chemicals do not become damp in storage.
• Instructions and dosages given are a guide to most effective use.


• This container must not be used or contaminated with any other materials.

Additional Information

Weight N/A

1kg, 5kg, 25kg



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