Understanding the Differences Between Chlorine and Salt Water Pools

10 June, 2024

The argument of the backyard saltwater pool versus chlorine pool has been an argument brewing for years. So we’re here to break down the pros and cons of both to help you figure out which one you want for your backyard. Or just to win the argument.

Let’s first understand the difference between the two pools. A swimming pool that uses chlorine either in tablet or granular form to disinfect the water is considered a chlorine pool. It is a powerful disinfectant used to kill bacteria, algae, and other contaminants in the pool water. On the other hand, saltwater swimming pools are a variation of pools that use saltwater chlorine generators to create tabulated chlorine with the help of salt. Pools are treated by adding salt to the pool water while the saltwater generator installed in the pool water will create chlorine gas, and this process will dissolve quickly again to treat the pool. Each pool type has different aspects, needs, and prices regarding maintenance, thus leaving a variety of experiences in maintaining different environmental footprints. Understanding these differences is also helpful for homeowners in deciding which type of pool installation will best combine their lifestyle, preferences, and long-term financial plan.

Evaluating Water Quality For Swimmers

Water quality always remains a prime concern for swimmers. Water from saltwater pools feels smoother or silkier and is less irritating on the skin and eyes. Since chlorine in saltwater pools is continuously produced from the salt, the levels are usually lower in such pools but steadier compared to fully chlorinated pools, hence reducing irritation on the skin and eyes. It is often likened to swimming in a lake or the sea — minus the saltiness and the sand. Your skin usually feels supple and moisturised, and no dryness is reported after swimming in a saltwater pool. On the other hand, their regular chlorine alternatives tend to lead some users to dry skin, eye irritation, and a persistent chlorine smell post-swim. Hair can lose its natural oils and turn green in the worst instances. Swimsuits can bleach out due to exposure to chlorine. Chlorine pools adequately maintained can cause just as minor discomfort. Water clarity is also not much of an issue; both types of pools typically offer clear and inviting water when correctly balanced.

Maintenance and Upkeep of Each Pool

Chlorine Pools

Simplicity can be costly in terms of maintenance effort. These types of pools need:

Constant Attention: A chlorine pool requires that it should be tested regularly and if the levels are unbalanced, that must be rectified like pH and alkalinity. If the levels are left unbalanced, it can cause irritation for the people swimming and there could be a higher chance of algae growing in such a pool. Such steps must be taken regularly, using purchased chemicals and a good understanding of pool water chemistry.
Balancing Act: pH should be maintained at 7.2-7.6 to allow the chlorine to work and protect swimmers’ comfort. This often requires adding pH balancing chemicals.
Shock Treatment: Regular shock treatments are needed to eliminate bacteria and contaminants not tackled by chlorine alone.

Salt Water Pools

Saltwater pools can enjoy a more relaxed maintenance schedule:

Salt Addition: The main thing to add in a saltwater pool is of course as its name suggests, salt. And, salt, unlike chlorine, does not evaporate. So, you will regularly need to add in the salt to maintain the proper and balanced level the water needs.
Balancing Basics: Saltwater pools also require that the levels be balanced of pH and alkalinity, however it is less regular compared to the chlorine pools.
Automated Sanitization: The salt chlorinator does the heavy lifting, converting salt into chlorine continuously, eliminating the need for constant manual chlorine addition.
Cell Care: Saltwater generators require periodic cleaning to remove calcium buildup. These cells typically last around five years and need to be replaced.
Metal Matters: Saltwater systems can lead to faster corrosion of metal pool components compared to chlorine systems.

A Cost Comparison of Chlorine and Salt Water Pools

Upfront Costs: The upfront costs for installing a pool vary widely between saltwater and chlorine systems. Saltwater pools often require a greater initial investment because of the more complex filtration and salt cell generation systems. On the other hand, chlorine pools tend to be less costly initially, with basic setups and no need for specialized equipment like salt cells. Chlorine wins in this category.
Ongoing expenses: Chlorine trumps this category. Considering long-term savings, the difference in monthly costs can be pretty astounding. Chlorine pools need chemicals to be bought constantly which can add up over time. Saltwater pools reduce chemical fees because the salt cell system synthesizes chlorine from the salt introduced to the pool. However, salt cells last for just several years, and replacements would also break the bank. Also, saltwater systems typically require much more expensive repair and replacement work due to the corrosiveness of salt.

Eco-Friendly Showdown: Chlorine vs Salt Water

When it comes to environmental impact, both chlorine and saltwater pools have their own considerations.

Chlorine pools can have a notable environmental impact. Chlorine, a powerful chemical, needs to be handled and stored safely to prevent accidents. Additionally, improperly balanced pool water can lead to chlorine runoff during heavy rains, which can harm wildlife and disrupt local ecosystems when it enters natural water bodies. Improper disposal of used chlorine can also contaminate groundwater. Disinfection byproducts like chloramines, formed when chlorine interacts with swimmer waste products, can irritate swimmers and potentially off-gas into the air.

Saltwater pools are not entirely guilt-free either, they also carry environmental considerations. The discharge of saltwater can have deleterious effects on the soil and plants due to its high salt content. In areas where the groundwater is susceptible to contamination from pool runoff, saltwater pools can contribute to the salinisation of local freshwater resources, impacting both the environment and water supply.

It is a close call as to which pool reigns supreme for the environment. Chlorine pools pose a risk of chlorine contamination if not managed carefully, while saltwater systems use more energy and require responsible disposal of salty pool water. In general, saltwater pools have a slightly better environmental profile due to their lower overall chlorine use. However, responsible management of both chlorine and saltwater systems is crucial to minimising their environmental footprint.

Conclusion

The choice between a saltwater and chlorine pool involves more than just money. Homeowners need to consider maintenance preferences, water quality, and environmental concerns in selecting one over the other. Long-term cost implications—including maintenance and probable equipment replacement—are pertinent for proper analysis.

Ultimately, the right pool for any given homeowner will align with their personal preferences, lifestyle needs, and commitment to environmental stewardship. Both saltwater and chlorine pools have their pros and cons, and understanding these will help pool owners make the choice that ensures the best pool experience for their family. Whether seeking the caress of saltwater or the traditional embrace of chlorine, the key is to dive into pool ownership with a clear understanding and readiness to maintain this treasured addition to your home.

References

https://www.hgtv.com/outdoors/outdoor-remodel/pool-systems-101
https://www.eco-outdoor.com/en-au/outdoor-design/maintenance-salt-vs-chlorine-pool
https://www.lowes.com/n/buying-guide/saltwater-pools-vs-chlorine-pools
https://www.homeadvisor.com/r/saltwater-vs-chlorine-pool
https://www.thespruce.com/saltwater-pool-and-how-it-works-2736556
https://healthline.com/health/salt-water-pool
https://en.wikipedia.org/wiki/Shock_chlorination