10 Best Salt Water Spa Systems 2026 in the United States

The Pentair IC40 EC-520555 IntelliChlor Replacement Salt Cell Chlorine Generator is a highly efficient and reliable option for maintaining saltwater spa systems. One of its major strengths is its ability to generate pure chlorine from saltwater, which not only softens pool water but also reduces the need to buy, carry, and store traditional chlorine. This leads to fewer bleached bathing suits and reduced chlorine spills, enhancing user convenience and safety. It integrates seamlessly with Pentair automation systems, making it a great choice for users who already have compatible equipment.

The IC40's construction with titanium blades coated in ruthenium oxide ensures durability, providing an extended lifespan compared to competitors. It features an easy-to-read display for monitoring chlorine levels, water flow, and salt levels, simplifying maintenance and reducing the hassle of regular checks. The 2-inch union connections make installation straightforward and user-friendly.

On the downside, the need for the EC-520556 IntelliChlor Power Center, which is sold separately, could be seen as an additional cost and inconvenience. Nonetheless, this product's design and build quality from a reputable manufacturer like Pentair make it a solid choice for those seeking an effective and low-maintenance salt-water spa system.

The INTEX 28427EH PureSpa Bubble Massage is an inflatable hot tub designed for up to 6 people, making it a great option for families or small groups looking for a portable and relaxing spa experience. It holds about 210 gallons of water and measures 85 inches in diameter, offering ample space without being too bulky. One of its strong points is the Fiber-Tech construction, which provides sturdy support while keeping the surface comfortable to sit on. The included hard water treatment system helps make the water gentler on your skin, which is a nice touch for comfort and spa maintenance.

Though it’s saltwater system ready, the spa doesn’t come with the salt cell itself, so you’d need to add that separately if you want a saltwater setup. It has 140 air jets that create a soothing bubble massage rather than powerful water jets, so if you’re looking for intense hydrotherapy, this might feel a bit mild. The spa also features an energy-efficient heater and a high-density insulated cover that can reduce heat loss by up to 50%, helping keep running costs down.

Assembly is required but straightforward, and the materials used, mainly durable PVC, are suitable for outdoor use though they won’t match the longevity or feel of more expensive, hard-shell hot tubs. The control system is user-friendly, focusing on simple temperature and bubble controls. Filtration is standard, helping keep water clean but may require regular upkeep to maintain optimal performance. This inflatable spa is well suited for casual users wanting an easy-to-set-up, budget-friendly spa with bubble jets and the option to add saltwater features. It ranks highly for comfort, energy efficiency, and portability but is less ideal if you desire strong massage jets or a fully integrated saltwater system out of the box.

The FreshWater Salt System Cartridge is designed to keep your spa or hot tub water clean and naturally sanitized with minimal effort. Each cartridge lasts about four months, which means fewer replacements and less hassle for you. It uses a titanium chlorine generator to produce chlorine from salt automatically, so the water feels more natural and is less likely to cause dry eyes or itchy skin. This kind of water treatment is effective and helps reduce the need for harsh chemicals, which also means you won't have to drain and refill your spa as often, saving water and money.

The cartridges are easy to swap out in seconds, making maintenance straightforward even if you're not very experienced with spa care. This product is compatible with popular spa brands like Hot Spring and Caldera, covering several spa models, so it fits well if you already own one of those. While the cartridge supports a good water treatment routine, it doesn't directly affect things like jet configuration or energy efficiency since it's a replacement part, not a full system.

The build quality appears solid, and user reviews are mostly positive, praising its effectiveness and ease of use. If you have a compatible spa and want a simple, low-maintenance way to enjoy clean, naturally treated water, this cartridge is a helpful addition. However, if you are looking to upgrade your entire salt-water spa system or need features related to jets or energy savings, you will need to consider other products.