If you are under the assumption that organic impurities such as sweat and oils alone are responsible for poor water quality in your swimming pool, you might be overlooking a whole bunch of other factors. One of those happens to be calcium scales which make the pool water hard – hard water in chemical terms, refers to water containing tough impurities that are too difficult to get rid of.

While the use of first-grade products such as Competition pool filters is essential in pool maintenance, it certainly isn't the best approach for dealing with pool water hardness. There are, of course, some really good ways to deal with this problem but first, you need to analyze it.

Pool water hardness

Water hardness in pools is usually caused by calcium scales. With the rate of evaporation rising steadily during summers, calcium carbonate scales tend to get deposited on the waterline of your pool. You will find these deposits either in the form of nodules or in the form of crusty residues in the corners of your pool. High pH, high alkalinity, and high water temperatures can result in calcium hardness of up to 400 ppm. In such situations, you can't rely on your swimming pool filter cartridges alone.

Before knowing how to remove calcium deposits from your pool, you need to learn how to prevent them in the first place. Mentioned below are some useful steps:

  • With sequestering agents, you can lock up the calcium. This way it will not precipitate, and thus scale deposits will not be formed.
  • Avoid using calcium hypochlorite shock as it will only release calcium into the pool water.
  • Maintain optimal pH and alkalinity in the pool water, preferably keeping both on the lower side of the permissible range.
  • Regularly measure the Langelier Saturation Index (LSI) of your pool and change the maintenance routine accordingly. The value of this index explains how vulnerable your pool is to the formation of calcium scales.
  • You can even seek out particles of calcium using a clarifier and then clump them together so that your filter can easily trap them.

If your pool water already has enough calcium deposits, you need to add a few items to your list while you buy pool filter products. The most important one among these items is pumice stone – it helps you remove calcium deposits from the walls and flooring of your pool.