People who are not suitable for whirlpool spa hot tubs: 1. People with heart disease: The stress of whirlpool spa hot tubs on the cardiovascular system 2. People with high blood pressure: Hidden dangers caused by blood pressure fluctuations 3. Pregnant women: The effects of high temperature in whirlpool spa hot tubs on the fetus 4. People with diabetes: Temperature regulation and nerve damage problems 5. People with epilepsy: Risk of seizures and safety hazards 6. People with skin diseases: whirlpool spa hot tubs may aggravate skin problems

Shock treatment is very effective in removing green matter, especially algae, from whirlpool spa hot tubs. But this requires the correct dosage, appropriate treatment methods and continuous maintenance of the overall water quality of the tub.

Generally speaking, the effects of shock treatment can usually be seen within a few hours, but it usually takes 12 to 24 hours to completely remove pollutants and restore water quality. If the water quality has become significantly turbid or has an odor, the treatment time may be extended to 24 hours or even longer.

If you want to maximize the space of a whirlpool spa hot tub in certain occasions, such as when hosting a party, a 7' x 7' tub can theoretically squeeze in up to 8 people. However, this experience may not be ideal.

Studies have shown that the amount of chlorine absorbed through the skin depends on the concentration of chlorine, the duration of immersion, and the individual's skin sensitivity. Although the amount of chlorine absorbed in a short period of time is small, prolonged exposure to chlorinated hot water may increase the total amount absorbed.

1. Electricity safety distance Generally speaking, the whirlpool hot tub should be at least 1.5 meters away from any electrical equipment (such as wires, transformers, sockets, etc.). 2. Fire protection requirements According to fire safety regulations, the whirlpool hot tub should be at least 1.5 meters to 2 meters away from the wall of the house.