FEBRUARY 2025
Saltwater and chlorine are two of the most common pool systems. Learn about the pros and cons of each and discover some new alternatives to both.
Pools are made up of many parts but it’s the sanitization systems that keep the water clean and healthy. Saltwater and chlorine systems are two of the most common pool systems, but how do you determine which one is right for you? Take a look at the advantages and disadvantages of each, plus explore some new technology in pool systems.
How Saltwater Pools Work
Saltwater Pros
There are several pros to a saltwater swimming pool system, mainly due to the decreased amount of chemicals needed.
Fewer Harsh Chemicals
One of the major benefits of saltwater systems is that they have significantly lower levels of chlorine than traditional chlorine systems and don’t require harsh chemicals. As a result, the water is gentler on your skin, eyes and hair, and it does not fade swimwear or towels the way that chlorine pools do. This might appeal to avid swimmers or parents who wish to avoid exposing children to chlorine. Saltwater pools also do not have the chlorine scent that some people dislike.
Lower Maintenance
In addition to health factors, saltwater pools are much lower maintenance than chlorine systems and thus more user-friendly. You don’t need algaecides because the system naturally helps prevent algae from growing on the walls or in the water. The chlorine generator does the work for you.
Cheaper to Maintain
Pool-grade salt also costs a lot less than chlorine and other chemicals that are needed for chlorine pools. So when it comes to day-to-day maintenance, saltwater systems are both easier and cheaper to maintain.
Saltwater Cons
Saltwater pools offer a better swimming environment, and while it might feel better on the skin and does not cause eye irritation, it’s not without problems.
Saltwater is Corrosive
Saltwater is corrosive to metal and tends to corrode any metal objects near the pool such as outdoor furniture and even nearby grills. The salt also corrodes natural stone, so any paving made of natural materials near the pool that gets splashed will eventually break down unless it’s properly sealed to keep out the water. Discuss the pros and cons with your pool professional but know that not every pool company recommends using a salt system. If you do decide to invest in a saltwater pool, remember that some pool parts and components might be made of materials that are susceptible to corrosion from salt, such as pool heaters, ladders, diving boards and handrails. Vinyl pools are often designed with metal walls that may experience saltwater corrosion, and plaster finishes on concrete pools may also be susceptible to saltwater. Fiberglass pools are the most resistant to wear and tear from saltwater exposure.
High Upfront Costs
While there are many cost benefits to maintaining a saltwater pool, the upfront costs are significant compared to chlorine pools. Purchasing and installing a chlorine generator can cost anywhere from $500 to $2,000 and up, and the equipment will likely need to be replaced in three to seven years. Repairing a chlorine generator can also get pricey, as you will need a licensed professional to handle repairs rather than taking a DIY approach.
CHLORINE POOLS
How Chlorine Pools Work
Chlorine systems rely on larger amounts of chlorine to sanitize your pool water. Unlike saltwater systems, which convert salt into chlorine, chlorine systems require that you manually add store-bought chlorine to the water. Chlorine systems must be tested once or twice a week to maintain the proper chemical balance in your water. These tests measure pH levels, alkalinity and levels of sanitizers like chlorine and bromine. You will need to regularly add chlorine and other chemicals depending on the chemical balance.
Chlorine Pros
With lower upfront costs and non-corrosive elements, chlorine systems are appealing to many.
Fewer Upfront Costs
Chlorine systems have very few upfront costs compared to saltwater systems. There is no need to purchase expensive equipment such as a chlorine generator, and you can perform all water tests and chemical balancing on your own without the need for a professional. “For a chlorine pool, it is inexpensive to install an inline or offline chlorinator that houses the chlorine tablets, or simply put them inside a floating chlorinator,” says Brian Farrell, franchise owner from Pinch a Penny in Mansfield, Texas. Chlorine systems are also fairly straightforward compared to saltwater systems, which rely on a complex chlorine generator, so it’s easier to perform DIY maintenance.
Not Corrosive
Unlike saltwater systems, which cause corrosion to metal over time, chlorine does not cause any major damage to pool parts. This means you won’t need to worry about replacing components due to corrosion down the line.
Chlorine Cons
While there are benefits to a chlorine system, there are also things to be aware of regarding the chemicals needed to keep a clean and sanitary swimming pool.
Irritating Chemicals
Chlorine pools rely on chemicals to keep the water sanitized and some of these chemicals come with certain health risks. Chlorine is known to irritate your skin, eyes and throat, and it can dry out skin and bleach swimwear. Some people simply dislike the smell of chlorine.
Buying and Checking Chemicals
While there are no major upfront costs to a chlorine system, chlorine pools require buying a steady supply of chlorine and other chemicals to balance your pool chemistry. This can add up over time, more so than the cost of salt for saltwater pools. You will also need to handle the chemicals when adding them to the pool, which may be unappealing to people who prefer avoiding exposure to harsh chemicals. Owners may also find maintaining a chlorine pool to be more cumbersome since you must perform weekly tasks such as checking the chemical balance, adding chlorine tablets and “shocking” the pool.
Chemical Storage
Another factor to keep in mind is that chlorine must be stored in a safe location, which may be especially tricky for people with young children or limited space.
Other Pool Systems
UV System
If you’re looking for options beyond saltwater and chlorine systems, you may want to consider a UV system to sanitize your pool. This system relies on UV bulbs to kill bacteria, algae and viruses in your water. It still requires some chlorine to help with sanitization, but it’s a lot less than a traditional chlorine pool. The UV light is housed in a chamber to eliminate direct exposure, so you don’t need to worry about harmful UV effects. The reduced presence of chemicals makes this a better choice when it comes to health risks, but you will need to pay upfront costs to install the UV system.
Learn More with K&D Pools
If you want to be able to enjoy the benefits of an Ozonator , then look no further than K&D Pools
We offer personalized service for every customer, so you can rest assured that you will receive exactly what you want.
Call us today and let’s see how we can help you create your outdoor Oasis!
By: John Ronay, CPO, CPB
John has over 20 years of experience in the Residential building industry including over 10 years in custom pool building and design.
