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How to Prolong Residual Chlorine in Outdoor Swimming Pool Water

A picture of an outdoor swimming pool

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As people’s pursuit of a healthy lifestyle continues to increase, outdoor swimming pools have gradually become important places for leisure and entertainment. However, there is also a growing concern for the water quality of swimming pools. Among them, how to maintain the residual chlorine in the water for a prolonged period has become a highly discussed topic. This article will explore some effective methods to help maintain the fresh and healthy water quality of outdoor swimming pools.

A picture of an outdoor swimming pool

Detailed steps for the water treatment of outdoor swimming pools include the following aspects

  1. Cleaning the Pool Surface: Due to the presence of surrounding trees, plants, insects, and leaves can easily fall into the pool. During the preparation work every morning and morning, the primary task is to clean the pool surface, removing debris and leaves floating on the water surface to ensure clarity.
  2. Operation of Filtration System: Outdoor swimming pools are usually equipped with filtration systems that use pumps to draw water into filters, filtering out suspended particles and microorganisms. During the preparation phase, check the operation of the filtration system to ensure it works properly. Clean or replace filters if necessary to ensure efficient operation.
  3. Chemical Water Treatment: To cope with various factors affecting water quality, outdoor swimming pools need to add appropriate water treatment agents such as chlorine and disinfectant tablets. This helps to kill bacteria, viruses, and other microorganisms in the water while maintaining transparency and cleanliness.
  4. Rainwater Discharge Treatment: Rainy weather may bring more pollutants, so it is necessary to consider the treatment of rainwater discharge. Set up a rainwater discharge system to ensure timely removal of excess rainwater, avoiding adverse effects on water quality.
  5. Water Circulation and Oxygen Supply: Adjust the working time and flow direction of the water pump to promote water circulation, preventing the formation of dead zones. Ensure an adequate supply of oxygen in the water to maintain freshness.

Methods to maintain residual chlorine in outdoor swimming pool water for a prolonged period

  1. Prepare Medications: Equip the necessary water treatment agents, including disinfectant powder or granules, pool algaecide, pH adjuster, and flocculant. These agents play a crucial role in maintaining water quality.
  2. Check Water Quality Equipment: Ensure the normal operation of water treatment equipment, especially the dirt suction machine (pool bottom vacuum cleaner). This effectively cleans debris from the pool bottom, maintaining water cleanliness.
  3. Use Water Quality Testing Tools: Use tools such as residual chlorine test kits and water quality analyzers for water quality testing. After closing the pool, add disinfectant before testing residual chlorine levels the next morning.
  4. Disinfection Process: Use disinfectant powder or granules for disinfection. The dosage is 1-2 kilograms per 1000 cubic meters of water, adjusted based on water quality conditions. In cases of new water supply or rainy conditions, an appropriate increase in disinfectant dosage may be necessary.

In general, places typically add disinfectants after closing the facility in the evening. The next morning, the water quality administrator tests the residual chlorine level. If it is too low, timely replenishment of disinfectant is necessary to prevent the rapid growth of algae. Due to the quick depletion of chlorine under sunlight, testing residual chlorine levels one hour before opening is advisable. If insufficient, add a little more.

  1. Monitor Residual Chlorine Levels: After testing by the water quality administrator, determine whether additional disinfectant is needed based on residual chlorine levels. Maintain residual chlorine levels within the appropriate range to prevent algae growth.
  2. pH Value Adjustment: Test the pH value of the water. If it is too low, add alkaline adjusters such as sodium carbonate to raise the pH value. Ensure the pH value is within the range of 7.4-7.6 to maintain effective disinfection. The dosage for adjusters is typically 10 grams per cubic meter for every 1-degree increase. Sodium carbonate adjusters are applied at a dosage of 15 grams per cubic meter.
  3. Use of Algae Remover: Depending on the situation, add an appropriate amount of algae remover to prevent algae growth in the pool water. During the peak season or when there are many swimmers, a double dosage may be applied. The dosage is 1 kilogram per 1000 cubic meters of water. For routine maintenance, treat every two or three days when there are fewer swimmers.
  4. Introduction of Clarifying Agent: If the water appears unclear or lacks transparency, introduce a clarifying agent. Typically, use it once a week for normal maintenance. For pools without a circulation system, it is recommended to use polyaluminum chloride.
  5. Use of Dirt Suction Machine: Choose a suitable dirt suction machine based on the pool’s condition, whether manual or automatic. Manual suction machines are suitable for pools with long-term use of polyaluminum chloride for water quality clarification.
  6. Management of Surrounding Environment: For outdoor swimming pools, regularly trim the branches around the pool to prevent insects from falling into the water. In cases where flowers, plants, and trees are close to the pool, insecticide treatment on branches may be necessary to effectively prevent insects from affecting water quality.

In conclusion, maintaining the water quality of outdoor swimming pools requires careful management due to factors such as high outdoor temperatures and rainy weather. Faced with sudden changes in water quality, targeted water treatment measures should be taken.

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