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  • Hot Tub and Pool Chemicals - Filters and solutions
  • Hot Tub Spa parts Cross Fit and by brand
  • Pools - Complete - Parts - Equipment
  • Accessories and tools you did not Know You Needed
  • Gazebo - Hot Tub Surrounds Benches- Tables - Sauna
  • Hot tubs and swim spas - New
  • Water Fun and Sports
  • Electric Motors-Industrial-New used-Refurbished
  • Repair Service pumps-circuit-boards-heaters
  • Financing and Barter Partners
  • Monitoring Service
  • Service and Repair centers

    • Shop by Brand

  • Cal spa
  • waterway
  • gecko
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    • Calcium Hardness Reagents

    Calcium hardness reagent is a chemical solution used to test the amount of dissolved calcium in pool or spa water. This test is crucial for maintaining water balance and preventing damage to pool surfaces and equipment. High calcium hardness can lead to scaling, while low levels can cause corrosion. 

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