How to Remove Calcium Deposits From Swimming Pools

Written by april dowling
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How to Remove Calcium Deposits From Swimming Pools
Promptly remove calcium deposits from swimming pools to prevent build-up. (Swimming pool image by Jim Mills from

Swimming pools provide refreshing recreation, relaxation and quality family time. However, they require a steady commitment to keep them clean and appealing. Calcium scale from evaporated moisture in concrete and tile grout can form crusty white deposits on pool walls, steps and other surfaces. While these crystalline deposits are virtually harmless, they accumulate and eventually ruin the pool's appearance. Fortunately, basic supplies are effective at removing unsightly calcium deposits from swimming pools.

Skill level:

Things you need

  • Stiff nylon brush
  • Pumice stone
  • Commercial liquid calcium remover
  • Warm water
  • Plastic bucket
  • Sponge

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  1. 1

    Scrub the calcium deposits with a stiff nylon brush. Try to remove as many calcium deposits as possible with the brush.

  2. 2

    Rub a pumice stone back and forth over the crusty deposits. Apply light pressure to prevent scratching the pool surface.

  3. 3

    Mix equal amounts of commercial liquid calcium remover and warm water in a plastic bucket. Read the product label for specific directions.

  4. 4

    Dampen a sponge in the solution. Blot the calcium deposits with the damp sponge.

  5. 5

    Rinse the affected pool surface promptly with water. If the calcium deposits persist, use the commercial calcium remover at full strength until the surface is clean.

Tips and warnings

  • Scrub the pool surfaces weekly with the nylon brush to prevent calcium build-up.
  • Wear latex gloves to protect your hands when using calcium remover.
  • Do not drain water out of the pool; draining can cause caving and other structural damages.
  • Do not remove the calcium deposits with a wire brush; the tiles and grout may become scratched or otherwise damaged.
  • Use a commercial calcium remover approved by your pool manufacturer to prevent damage.
  • Follow all directions on the commercial calcium remover for safety purposes.

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