If chlorine shock treatment is performed for two consecutive days, the residual chlorine concentration in the water may be too high. High concentrations of residual chlorine not only produce a strong chlorine smell, but may also irritate the skin and eyes, and even cause respiratory discomfort.

If you use a chlorine-based shocking agent, you need to wait for a period of time (usually about 24 hours) after the shock treatment to allow the chlorine content in the water to drop to a safe level (1-3 ppm) before using the whirlpool hot tub. If you use a non-chlorine shocking agent, you generally only need to wait 20-30 minutes before using the tub again.

The causes of outdoor spa hot tub foam are: 1. Body oils and skin care product residues 2. Soap or detergent residues 3. Unbalanced water quality 4. Cleansing product residues 5. Too much air in the water

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.