If you’re in charge of maintaining a public swimming pool, you know the importance of having it professionally cleaned on a regular basis. In addition to keeping the pool sanitary and safe, frequent maintenance keeps it looking pristine by removing the unsightly buildup of calcium deposits. For a better understanding of what these are, use the frequently asked questions below.

A Guide to Swimming Pool Calcium Deposits

What do calcium deposits look like?

There are two types of calcium compounds that can buildup in a swimming pool. One is calcium carbonate, which forms white, flaky scales on pool tile. The other is calcium silicate, which leaves behind a grey, stain-like residue on tiles. If you’re unsure which kind of calcium buildup you have, a professional pool cleaning service can test and identify it for you.

What causes calcium deposits?

Calcium deposits form when there is excess calcium in pool water, which is a sign that the water is not properly balanced. This can be due to a number of factors, including high pH levels, high alkalinity, frequent temperature changes, or evaporation.

Why do calcium deposits need to be removed?

In addition to making pools look dirty and uninviting, calcium buildup can cause damage if it’s not professionally cleaned. The deposits can erode a pool’s plaster to the point where refinishing or resurfacing is necessary.

Calcium buildup can clog a pool’s filtration system, which leads to cloudy water, algae growth, and unnecessary pressure being put on the pool pump. Pool water that has a high concentration of calcium can also cause eye and skin irritation in swimmers. 

What can I do to prevent calcium buildup?

The best way to keep a pool clear of calcium deposits is to schedule pool service to perform regular cleaning and maintenance tasks. They may also apply a calcium blocker to the pool’s tiles and glass. If you do spot flaky scales starting to form, address them as soon possible—the longer you wait, the harder they will be to remove. 

If you’re responsible for maintaining a public pool, trust experts at A'e Loa Pool Service & Repair. For more than 15 years, this family-owned business has provided first-rate commercial pool services throughout Oahu, HI, including cleaning, maintenance, and repair. Visit their website to learn more about how they can help you, and call (808) 391-2108 to speak with a swimming pool contractor.