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The whirlpool outdoor spa tub's filtration system requires regular maintenance. Failure to do so will deteriorate water quality, affecting user experience and potentially damaging the equipment. Clean the paper filter weekly and replace it every 3-4 months; backwash the sand filter every 2 weeks; and backwash the diatomaceous earth filter monthly.

When Jets on: · Rapid water circulation; · Strong localized water flow disturbances; · More uniform temperature throughout the tub; · However, power consumption increases significantly. When Jets off: · Slow or stagnant water flow; · Water temperature rise is concentrated near the heating element; · Uneven temperature distribution within the tub, but system power consumption is reduced; · More stable heater operation.

To ensure clean and healthy water, whirlpool spa hot tub water quality management requires the assistance of specialized tools. The following are some common and essential tools: 1. Water quality testing kit 2. Water filter 3. Pump cleaning kit 4. Descaling agent 5. Chemical dosing kit

Escherichia coli is a common intestinal bacteria that normally lives in the human intestine. However, when the water quality is poor, intestinal bacteria can enter the bathtub through unclean water sources and may even be spread through the bathtub's filtration system.

The strong water flow of the whirlpool spa hot tub has a certain impact on the skin surface, which may form micro-injuries that are invisible to the naked eye. Combined with the decreased immunity of diabetic patients and potential microbial contamination in the water, this micro-injury is very likely to develop into deep skin infection or cellulitis.

· Small bathtub: suitable for 2-3 people, suitable for families with small space or occasional use. · Medium bathtub: suitable for 4-5 people, more suitable for most families, and can meet the needs of family members or relatives and friends gathering. · Large bathtub: suitable for more than 6 people, suitable for families with more family members or frequent use needs.

During the water filling process, the whirlpool spa hot tub must be closed, especially its water pump and nozzle system. It is strictly forbidden to operate the equipment when there is no water or the water level does not reach the safety line.

The water temperature of a whirlpool spa hot tub causes blood vessels to dilate, which leads to increased blood flow. If you stay in the tub for too long, abnormal blood circulation may cause low blood pressure, which manifests as dizziness, drowsiness, fatigue, and other symptoms.

Clean the inside of the jet with white vinegar or a special detergent. The acidic components in white vinegar can effectively dissolve scale and mineral deposits. Pour white vinegar into the inside of the jet and gently shake the jet to ensure that the vinegar can penetrate every corner of the jet. After soaking for 10 to 15 minutes, rinse it with clean water.

In 2007, UCSF conducted a study on 11 men with fertility problems and found that after using the hot tub for at least 30 minutes a week for three months, the number and activity of sperm decreased significantly. After stopping use, 45% of the participants increased their total sperm count by about 491% within 3-6 months.

The internationally recognized safe range of whirlpool spa hot tub water temperature is generally 36°C to 40°C, which is the temperature range that most adult users can comfortably and safely withstand: ·36°C: close to normal human body temperature, suitable for long-term soaking, especially for those who are sensitive to heat; ·37~38°C: ideal bathing temperature for most adults, with good relaxation effect; ·39°C~40°C: thermal therapy level temperature, suitable for short-term intensive hydrotherapy, used to relieve deep muscle tension.

-- Most insurance companies, based on standards such as the U.S. Medicare program, determine that only small hot water equipment designed specifically for medical purposes meets the DME standard. Common hot tubs are classified as personal care products, such as massage chairs, saunas, or swimming spas, and do not meet the definition of "medical devices."