Did you know that about 35% of residential pools are a “saltwater” pool? You may be curious about what that means and how it affects the pool owner, so we want to share some information on the saltwater pool.

Many times, pools are categorized as “chlorinated” or “salt” however, these classifications are somewhat misleading. You may be interested to learn that saltwater pools are also sanitized by chlorine but the difference is how it gets into the water.

The Science Behind Saltwater Pools

With a traditional chlorinated pool, liquid or solid chlorine is added to the water. It then breaks down into hypochlorous acid which kills bacteria and microorganisms.

This same acid is also used in saltwater pools, but it is generated from salt. Think back to your high school chemistry class because the process from salt to chlorine involves a few chemical reactions.

After adding salt to the pool, the water passes through an electrode cell composed of ruthenium coated titanium plates. This electrolysis of salt waterstimulates a chemical reaction which creates chloride ions, sodium hydroxide and hydrogen. The sodium hydroxide raises the pH of the water so it’s not too acidic and the hydrogen is the “H” in pH!

When the chloride ions are oxidized, they form chlorine gas which then dissolves in the pool water as sodium hydroxide and hypochlorous acid. This is the same component used to clean the water as a traditional “chlorinated pool”. And, the sodium hydroxide lowers the pH so the water does not become too basic. The entire process really seems to balance itself out and clean the water too! The beauty of chemistry.

Saltwater Maintenance

As far as maintaining a saltwater pool, you will still need to check the levels and respond accordingly but they are certainly less maintenance than a traditionally chlorinated pool. This type of filtration can work for extended periods without modification, so less time is required for upkeep. Many people appreciate the freedom from purchasing and handling chlorine and not having to store this potentially dangerous chemical is appealing for those with pets and small children.

Although the start-up cost is a bit more for this type of system, your annual maintenance budget is less, so it really does even out. Typically, a salt chlorine generator will last 3 – 7 years before needing to be replaced.

If you have questions about saltwater pool or spa or the possibility of converting your pool, give Hollandia, London Ontario’s pool and spas experts a call 519-652-3257. We are happy to discuss the pros and cons to help you make the decision that is right for your family.