Does your Pool Tile have Calcium Buildup?

It is very crucial to understand several factors that can contribute to the calcium buildup in your swimming pool.
The swimming pool is one part of the house that is particularly useful in the hot summer months.

Unfortunately, over time calcium scales can start to build up on your swimming pool tiles especially if you have neglected to keep it in tiptop shape.

Understanding the Water in your Pool

It is very crucial to understand several factors that can contribute to the calcium buildup in your swimming pool. There are five factors that work together to bring about water quality that is excellent for swimming. These are filtration, pH level, chlorination, calcium hardness, and total alkalinity.

Filtration removes larger debris and particles from the water while chlorination will disinfect and render harmless any microorganisms that may be present in the water. The pH level of the water in your swimming pool indicates whether it is acidic or alkaline. The recommended pH level for swimming pool water is between 7.0 and 7.6. If the pH level goes beyond 7.6 you risk developing skin rashes as the water will be alkaline. If you have a pH level of less than 7.0 you risk getting stings in your eyes and other mucous membranes as the water will be acidic. The pH levels of your swimming pool water is directly related to the overall alkalinity of the water.

The last factor is calcium hardness which technically accounts for the amount of calcium that is dissolved in your swimming pool water. If there is too little calcium levels in the water, the different surfaces in your pool such as your tiles will easily deteriorate, meaning, they have highly corrosive tendencies. However, if there is too much calcium dissolved in water, this can lead to scaling or the build-up of calcium deposits.

Understanding Calcium Scales

Calcium is naturally found in water. That is why too much of it is called hard water and too little, soft water. In your swimming pool, calcium must be maintained at a relatively safe range of between 80 and 150 parts per million (ppm) for vinyl swimming pools and between 150 and 200 ppm for masonry-finished swimming pools.

One of the factors that can influence elevations in swimming pool water calcium levels is the addition of too much chlorine products that contain calcium hypochlorite. These products can naturally increase the level of calcium already present in swimming pool water to as much as 400 to 500 ppm.

Now, it should be apparent that calcium scales are brought about by excessively higher concentrations of calcium in the swimming pool water. It also goes without saying that anything that can increase calcium levels can also increase calcium hardness and thus lead to greater scaling. However, pH and alkalinity can also contribute to scaling. In general, a pH level of not less than 7.8 and an alkalinity level of not less than 120 can all lead to scale formation.

This simply means that the scaling your find in your swimming pool tiles may not only be caused by the overall hardness of the water but also an abnormally high level of pH and subsequent alkalinity.

Removing Calcium Scales Off your Swimming Pool Tiles

There are plenty of products in the market that can be used to remove calcium scales off swimming pool tiles. If the calcium buildup is light enough, a solution of muriatic acid diluted in water and scrubbed vigorously on tile surfaces with calcium scales has been shown to be quite effective. Depending on the surface of your swimming pool wall, you can try to scrape off the scales by using a putty knife or even a flat-head screwdriver. For best results however, pool cleaning companies can use blasting techniques to remove the calcium scales. Be ready to pay a huge amount, however.


Once the calcium scales have been removed, make sure to maintain the quality of your swimming pool water from now on. You now know that water in your swimming pool needs to have the correct levels of pH, alkalinity, chlorine, and calcium in order for you to prevent any future build-up of calcium scales. This is why performing water testing will be crucial to maintain such delicate balance in swimming pool water quality. Water quality testing kits are inexpensive and should provide the backbone to all your swimming pool maintenance needs.

Additionally, you can use pool water magnetizers or magnetic water conditioners in order to help reduce the risk of calcium scale formation and build-up. These products work by rendering water to assume a positive charge as it passes through the return line. Furthermore, chelating products can also help prevent scale buildup.

If the calcium level is high, partially emptying the swimming pool and replacing it with soft water will help maintain acceptable levels of calcium hardness. Also, make sure to test the water’s pH and alkalinity. Remember, the higher the pH and alkalinity, the greater is the likelihood of scale buildup.

So, the next time you use your swimming pool, make sure to clean it afterwards and check whether there are any changes in its water quality.

Distributed by eBrandit Inc.

Media Contact
Company Name: Avalon Pools
Contact Person: Mike Volinski
Phone: (909) 815-7419
Address:1503 N. Campus Ave
City: Ontario
State: California
Country: United States