17537 132nd Ave NE Woodinville, WA 98072 (425) 487-6400 info@kriscopools.com

A sparkling clean pool with beautiful, glistening tile can be a refreshing sight to see on a hot day. However, if you don’t stay on top of things, you’ll quickly see that great-looking tile become dull and develop an unsightly white coating.

This coating is caused by calcium deposits and if neglected, it will continue to get thicker. Eventually, it can become so thick that you won’t be able to see the tile underneath it any longer. Learn what causes calcium growth on your pool tile and how to prevent and/or remove it.

What Causes Calcium to Build-up on Pool Tile?


Hard water causes the presence of calcium in the pool water to the degree that it can negatively affect the look of the tile. Hard water is water that contains an excessive amount of calcium and magnesium.

If you have spotted drinking glasses, white film on your faucets, and hard rings around your toilet bowls, then these are other signs you have hard water coming from your taps.

When the water in your pool touches the tile, the calcium clings to the tile’s surface. Faster water evaporation, such as what happens on hotter days, causes the calcium to affect the tile more noticeably.

What Can You Do to Prevent Calcium Growth on Tile?

Cleaning your pool regularly and properly is one of the best ways to prevent calcium growth on the tile. When you brush the pool, pull the brush all the way up onto the tile. The brush will get heavier and awkward to work with as you pull it past the water line, so you’ll have to work harder to properly brush the tile area.

Another crucial step is to test your pool’s water chemistry regularly and add in the necessary chemicals. Use a detailed kit that covers all the important pool readings, and read the instructions completely. Aim for a water hardness level that’s somewhere in the middle of 200 parts per million (ppm) and 400 ppm.

Cloudy water is a sign the water may be too hard. If you look at your pool and notice the water suddenly looks cloudier than normal, test the chemicals even if you’ve done so recently.

How Do You Remove Calcium Growth From Pool Tile?

You can use a tile cleaner intended to remove calcium, which is safe to use on pool tile. You may need to use a plastic scraper and a scrubbing pad to help remove stubborn deposits.

For thick calcium buildup, use BioGuard Off The Wall.  It penetrates and removes tough grime, scale and deposits from pool and spa surfaces.  It is a non-abrasive thick oil formula with enhanced stain removal capabilities.

Who Can You Contact for Help Maintaining Your Pool?

If you are having problems defeating calcium in your pool, or you would like your pool serviced properly then contact us here at KrisCo Aquatech Pools & Spas. Our knowledgeable and experienced staff is waiting to help you with all your pool needs.

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