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If the hot tub is not shut down, the pump is still running, and the filter is in a working state driven by water pressure, and removing the filter rashly may cause the following problems: 1. Water gushing 2. Equipment damage 3. Safety risks

Calculate the amount of antifreeze required based on the capacity of the hot tub and the use ratio of antifreeze. For example, if the capacity of the hot tub is 300 gallons, and one quart of antifreeze is required for every gallon of water (a 1:4 ratio), then the total amount of antifreeze required is 300 quarts, or about 75 gallons.

If multiple people use a hot tub every day, contaminants such as body oils, sweat, and cosmetics will increase significantly in the water, which will accelerate the consumption of bromine. Frequent use means that bromine needs to be added more frequently to maintain its disinfecting effect.

People who are not suitable for outdoor hot tubs: 1. People with cardiovascular diseases 2. People with respiratory diseases 3. People with diabetes 4. Pregnant women 5. People with sensitive skin or skin diseases 6. People with poor body temperature regulation 7. Alcoholics and drug users 8. People with weak immune systems 9. People who are overly tired or dehydrated

Large hot tubs usually refer to those hot tubs that can accommodate multiple people at the same time, such as 6-person and 7-person hot tubs. This type of tub not only provides more space for use, but also has more functions.

Common home hot tubs are usually equipped with 3kW to 5kW heaters. For example, a 3kW heater can heat about 2°C to 3°C per hour. If you want to heat from 15°C to 40°C, it theoretically takes about 8 hours. In contrast, if it is a 5kW heater, the time required may be shortened to about 5 hours.

The relatively low power of the plug-and-play hot tub's heater means that the water will heat up more slowly in cold environments. Especially when the outdoor temperature is near or below freezing, the tub will take more time to heat the water to the ideal temperature.

Diseases that can be spread in hot tubs: 1. Legionnaires' disease (causing severe pneumonia), 2. Pseudomonas infection (ear, urinary tract infection), 3. Skin fungal infection (skin itching, erythema), 4. Norovirus infection (diarrhea, vomiting, fever), 5. Mold infection (cough, nasal congestion).

A hot environment causes the body to expend more energy to maintain internal temperature balance and stimulates the activity of the sympathetic nervous system. Increased activity of the sympathetic nervous system leads to increased adrenaline secretion, faster heartbeat, and possibly higher breathing rate.

Most free-standing hot tubs do not need to be fixed directly to the floor when installed. This is because the design and materials of free-standing tubs are usually stable enough, especially when filled with water, and the weight is greatly increased, so it is not easy to slide or tilt.

The use environment of a whirlpool hot tub is inherently very suitable for mold growth. Bathrooms are usually humid and poorly ventilated spaces. The humidity in the bathroom is further increased during bathing, and the water temperature is usually kept in a high range (30-40 degrees Celsius), providing ideal conditions for the growth of mold.

A user who uses the hot tub for a few hours a day may find that the heater fails after 4 to 5 years, while a user who uses it a few times a week may extend it to more than 7 years. Therefore, the frequency of use directly affects the life of the heater.