10 Best Hot Tubs 2025 in the United States

The FROG @Ease Mineral Cartridge + SmartChlor Cartridges is tailored for specific hot tub models, including those from Artesian, Marquis, Caldera, and Hot Springs. Its main strength lies in its dual-action sanitization approach. It combines a low chlorine level with FROG Sanitizing Minerals, which not only helps eliminate organic contaminants but also conditions the water for a softer feel. This product notably reduces chlorine usage by up to 75%, which can be a significant plus for those concerned about skin irritation and harsh chemical exposure.

Another appealing aspect is the maintenance convenience. The cartridge includes a mineral component that lasts up to 4 months, along with three SmartChlor cartridges that last 3-4 weeks. This means less frequent replacement and upkeep, which is ideal for users who prefer a low-maintenance approach.

Its use is limited to certain hot tub models, which could be a barrier for those with different brands or models. Additionally, while it does maintain a consistently low chlorine level, some users may still require additional chlorine or shock treatments depending on their hot tub usage and environmental factors. Energy efficiency is not explicitly mentioned in the product details, so potential buyers might want to inquire further on how this product fits into their overall energy consumption plans. Finally, other users might find that the upfront cost of the cartridges could add up over time, particularly for those with larger tubs or frequent usage.

The INTEX 28431EP PureSpa Plus Bubble Massage Spa Set is well-suited for anyone seeking a spacious and relaxing home spa experience, accommodating up to 6 people with its 85-inch diameter and 28-inch height. It features 170 jets that provide a soothing bubble massage, enhanced by an innovative Fiber-Tech Beam Construction which ensures both comfort and structural stability.

The built-in Hard Water Treatment System is a noteworthy inclusion, making the water gentler on skin and prolonging the spa's lifespan by preventing mineral buildup. The spa's heating system utilizes Positive Temperature Coefficient (PTC) technology, which efficiently transfers heat to the water, ensuring safety and consistent performance. An energy-efficient spa cover further enhances insulation, reducing heat loss by up to 50%, which can help lower operational costs.

Additional accessories like the contoured headrests and LED light add to the relaxation experience. Potential buyers should be aware that the spa requires assembly and is fairly heavy at 124.5 pounds. The use of polyvinyl chloride (PVC) material is durable, but some users might prefer a more premium material. This product ranks well in the outdoor hot tubs category, making it a reliable choice for those looking to enjoy a comfortable and efficient home spa experience.

The Intex 28429EP PureSpa Plus Bubble Massage Spa is a solid choice for anyone wanting an affordable, portable hot tub that fits up to four people comfortably. Its size (77" diameter and 28" height) and round shape make it suitable for small groups or families. One big plus is the impressive number of jets—140 air jets—which provide a soothing bubble massage experience rather than powerful water jets, so it’s better for relaxation than deep hydrotherapy. The tub’s Fiber-Tech beam construction gives it good stability while remaining soft to the touch, and the PVC material is standard for inflatable spas, balancing durability with ease of setup.

Heating is handled by a Positive Temperature Coefficient (PTC) heater that efficiently warms the water, though it runs on standard 120V power, which may take longer to heat compared to higher-voltage models. The built-in hard water treatment system helps protect the spa and your skin, which is a thoughtful feature for those with tougher tap water. For controls, this tub uses simple, user-friendly buttons, and the included mood-setting LED light adds a relaxing ambiance.

Maintenance is fairly straightforward with a filtration system designed to keep water clean, but because it’s an inflatable model, it requires careful handling to avoid punctures and regular water treatment to maintain hygiene. Energy efficiency is decent for this type of spa, but heating and running the bubbles continuously can still increase electricity use. Intex backs this spa with a 1-year warranty and customer support, which is reassuring for first-time hot tub owners. While it doesn’t offer the luxury or power of premium hard-shell hot tubs, it represents a great entry-level option for casual use, especially if portability and budget are important factors.