Saltwater Hot Tub Pros and Cons

How do saltwater hot tubs work?

A saltwater hot tub uses a sanitation system that is different from that of traditional hot tubs. Salt (sodium chloride) prompts an electrolysis process within the saltwater generator, which makes chlorine that sanitizes the water.

Because you’ll need to purchase the salt chlorine generator, saltwater hot tub prices may be higher initially, but the maintenance of saltwater tubs is generally cheaper than the maintenance of traditional hot tubs.

“Considering a saltwater hot tub can be a fantastic decision primarily due to its skin-friendly and seemingly more soothing water,” said Andrei Newman, founder of Designer Home Spas in Miami, Florida.

The pros and cons of a saltwater hot tub

Saltwater hot tub benefits

Many people are looking for healthier ways to use their hot tub. Modern saltwater hot tubs are designed to generate their own soothing and healing properties with clean water without the potential effects of chlorine.

Here are common benefits of saltwater hot tubs that ensure a relaxing and healthy soak:

1. Increased water softness and buoyancy: The moderate amount of chlorine produced by the salt system keeps your water quality consistently soft for longer periods before draining and refilling your hot tub water. The steady flow of naturally produced chlorine reduces the risk of dry and cracked skin that harsh chemicals cause. Salt also raises the buoyancy of water, providing a more soothing experience while soaking.
2. Gentle on sensitive eyes and skin: Sensitive eyes and skin are prone to irritation when soaking in chlorinated water. Since chlorine is naturally generated in saltwater hot tubs, chloramines are less likely to build up, keeping your eyes and skin safe from irritation.
3. No unpleasant odor: Chlorine solutions have an unpleasant smell that sticks to your skin and hair after a soak. Salt systems prevent the mutation of chlorine into chloramines that produce the foul smell because when natural chlorine molecules are used up, they revert to odorless sodium chloride or salt.
4. Increased buffering capacity of the water: Adding the right amount of salt to your hot tub water makes it more resistant to water chemistry fluctuations. The minerals in the salt help withstand changes in alkalinity, pH and calcium hardness.
5. Cheaper maintenance: “A saltwater system converts salt into chlorine, thereby reducing the need to manually add chlorine frequently,” said Newman. More advanced saltwater hot tub models are able to boost chlorine during times of heavier use. All you have to do is test the water at least once a week. You also don’t need to purchase or handle hot tub chemicals like chlorine tablets or bromine that may be dangerous to children and pets if not properly stored.

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Saltwater hot tub disadvantages

Saltwater hot tubs are a good alternative to traditional hot tubs but they, too, are not perfect. Things can go wrong with your saltwater system if you’re not able to monitor its performance and properly maintain it. Here is the downside of saltwater hot tubs:

1. Initial cost is higher: “Saltwater hot tubs can be a bit more expensive upfront due to the cost of saltwater generators,” Newman said. A saltwater system as an addition to your existing hot tub requires a substantial investment that may range from $500 to $5,000.
2. Cell replacement adds to your costs: A hot tub salt cell usually lasts 2-5 years depending on the quality of the cell, frequency of use and the level of care you give it. Salt cells are made of parallel titanium plates that may eventually chip off due to low salt levels, wear and tear or inadequate maintenance.
3. Risk of corrosion: Salt is corrosive to metal. “Over time, the salt can potentially cause corrosion on certain parts of the hot tub if not properly maintained,” said Newman. There have been claims of saltwater systems damaging heaters, liners and underwater lighting due to excessive salt levels.
4. Water needs to remain above 60℉: When water temperature falls below 60 degrees Fahrenheit, your salt system can have difficulty producing chlorine even if the cell is running. Most salt systems automatically shut down when low water temperature is sensed, potentially reducing the chlorine level and creating a breeding ground for microorganisms.

How much do saltwater hot tubs cost?

Hot tub prices range from $2,000 to $32,000, and saltwater systems typically cost between $500 and $5,000. So, you can expect to find a saltwater hot tub for around $2,500, with higher-end saltwater tubs between $30,500 and $37,000.

Although the initial price tag is higher, the cost of maintenance over time is lower than a traditional hot tub. Instead of buying chlorine and other chemicals to sanitize the hot tub, you only need salt to keep a saltwater hot tub sanitized.

For example, a chlorine-based hot tub might require $200 to $400 yearly for chemicals, but a saltwater hot tub may reduce that to $100 to $200 per year, plus the cost of salt cell replacements. Over five years, the higher upfront cost can be partly balanced by lower yearly expenses, possibly resulting in long-term savings. However, the actual break-even point depends on how often you use your hot tub, your local water quality and how well you maintain it.

How to maintain a saltwater hot tub

To maintain a saltwater hot tub, follow these steps:

• Test the water weekly: Check for pH, alkalinity and chlorine levels to maintain balance.
• Monitor salt levels: Ensure salt levels are within the recommended range for optimal generator performance.
• Clean the salt cell regularly: Prevent buildup and extend the lifespan of the generator.
• Inspect for corrosion: Look for early signs of rust or wear on metal parts.
• Keep water above 60℉: Ensure proper temperature for effective chlorine production.
• Drain and refill periodically: Replace the water every three to four months or as recommended.

Who should buy a saltwater hot tub?

Saltwater hot tubs are ideal for homeowners who want to enjoy a gentle hot tub experience. The added cost of a salt cell can be offset by easier maintenance and more enjoyable use.

ConsumerAffairs reviewer, Kevin from Colorado said: “The maintenance is super easy with the salt water system and the operation cost is not noticeable in my electric bill. Find the tub to be relaxing and the jets have more than enough power to soothe my muscles.”

When it comes to deciding which hot tub to buy, choose the one that has the features you want and will be easiest for you to maintain.

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