Studies show that bacteria multiply fastest in water temperatures between 35–42°C, which is precisely the operating temperature range of a spa hot tub. Therefore, if the water is not changed or cleaned regularly, each milliliter of water may contain hundreds of thousands to millions of bacteria and microorganisms.

To ensure efficient and safe operation, the following items must be kept away from the spa hot tub: Bubble bath liquid, shower gel, soap, shampoo Essential oils, aromatherapy oils, oil-based fragrances Food or beverages Pool chemicals Non-spa-specific cleaning agents etc.

Yes, a swim spa tub can absolutely function as a hot tub. A swim spa tub is an integrated spa device that typically possesses the following core features: • Large water volume • Constant temperature heating system • Powerful water flow system • Water circulation and filtration system etc.

Swim spa hot tubs are typically maintained at a temperature of 33°C to 38°C. Warm water initially dilates blood vessels, followed by slight vasoconstriction as the body regulates temperature. This temperature cycle makes the nervous system more active, thus triggering a "wrinkle response."

The bactericidal effect of chlorine decreases significantly at pH > 7.8, while bromine remains effective within the pH range of 8.0–8.5. This means that users do not need to frequently adjust the water quality in a spa hot tub.

Adding magnesium, such as magnesium sulfate (Epsom salt), to the water in a spa hot tub is only acceptable if the salt content does not exceed the recommended range. Especially when the total salinity exceeds 1500 ppm, it may cause corrosion or damage to the internal components of the hot tub.