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  1. 5kg - Calcium Hardness Increaser - Hardness + / Calcium Raiser - CrystalClear®

    Effortlessly maintain the ideal calcium hardness level of your pool with the 5kg Calcium Hardness Increaser by CrystalClear®.

    eBay

  2. 50pcs Multipurpose 5 in 1 Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool

    50pcs Multipurpose 5 in 1 Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool

    Aliexpress UK

  3. Hardness Plus Calcium Increaser Pool Pools Spa Tub 1 kg

    Hardness Plus - your pool or spa water needs to have a Calcium Hardness level of between 200ppm (mg/l) and 300ppm. Full usage and dosage instructions are given on the container. So, if you live in a soft water area, this product could be for you.

    eBay

  4. 16-In-1 Drinking Water Test Kit Strip Home Water Quality Test Swimming Pool Spa Water Test Strip Nitrate Nitrite PH Hardness

    16-In-1 Drinking Water Test Kit Strip Home Water Quality Test Swimming Pool Spa Water Test Strip Nitrate Nitrite PH Hardness

    Aliexpress UK

  5. Test All Water Spa Calcium Hardness Plus (Calcium Chloride) 1KG

    Spa Hardness Plus. This is used to increase the levels of Calcuim Hardness in Spa and Hot Tub water. Your spa and hot tub water needs to be between 100ppm and 200ppm.

    eBay

  6. 50pc Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness Test Strip 3in1

    50pc Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness Test Strip 3in1

    Aliexpress UK

  7. Spa Essentials 32534000 Calcium Hardness Increaser Granules for Spas 1-Pack

    Item model number: 32534000. Calcium Hardness Increaser Granules for Spas and Hot Tubs. Increases Calcium Hardness Level In Spa Water. Unit Count: 12.0 Ounce. Global Trade Identification Number: 00017541646116.

    eBay

  8. 50pcs Multipurpose Water Test PH Strips 6-in-1 Residual Chlorine Value Alkalinity Hardness Tester Easy Detection for Pool Spa

    50pcs Multipurpose Water Test PH Strips 6-in-1 Residual Chlorine Value Alkalinity Hardness Tester Easy Detection for Pool Spa

    Aliexpress UK

  9. Aquasparkle 1kg Spa Hardness + Calcium Plus Increaser Spa Hot tub Pool

    Aquasparkle Spa Hardness Plus 1Kg. Contains: Calcium Chloride - 1kg Compatible with all spa sanitizers. Next adjust the PH and finally, if required, adjust the Calcium Hardness Granular Formula.

    eBay

  10. 50pcs Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness Test Strip

    50pcs Chlorine PH Test Strips SPA Swimming Pool Water Tester Paper Residual Chlorine PH Value Alkalinity Hardness Test Strip

    Aliexpress UK

  11. Lay-Z-Spa Bw60304 Detachable Canopy

  12. 50 Strips 14 in 1 Test Strips Swimming Pool Spa Reagent Strips for Water pH Chlorine Alkalinity Bromine Hardness Tools 40%off

    50 Strips 14 in 1 Test Strips Swimming Pool Spa Reagent Strips for Water pH Chlorine Alkalinity Bromine Hardness Tools 40%off

    Aliexpress UK

  13. 50 Strips 7 in 1 Test Strips Swimming Pool Spa Reagent Strips for Water pH Chlorine Alkalinity Bromine Hardness Tools 40%off

    50 Strips 7 in 1 Test Strips Swimming Pool Spa Reagent Strips for Water pH Chlorine Alkalinity Bromine Hardness Tools 40%off

    Aliexpress UK

  14. 50/100pcs 3/5/6/7 in 1 Swimming Pool PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool for Chlorine Bromine

    50/100pcs 3/5/6/7 in 1 Swimming Pool PH Test Strips SPA Swimming Pool Water Tester Paper Hardness Tool for Chlorine Bromine

    Aliexpress UK

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