Summer is the peak season for fish growth, making it a critical time for aquaculture management. As fish metabolism increases due to higher water temperatures and more frequent feeding, ponds become more susceptible to disease outbreaks and water quality issues. Therefore, maintaining optimal water conditions is essential for successful summer fish farming.
One of the most effective ways to improve water quality is through the use of specific treatments. First, quicklime is commonly used to adjust pH levels, reduce toxic gases, and inhibit harmful bacteria. Fresh quicklime should be applied at a rate of 15–20 kg per mu when the water depth is 1 meter. The lime should be dissolved in water and evenly distributed across the pond, typically every 20–30 days. Another option is the use of photosynthetic bacteria products, which help maintain clear, healthy water by reducing algae blooms and improving oxygen levels. These bacteria also enhance fish digestion and immunity. They should be applied once every 20 days, ensuring even distribution throughout the pond.
Aeration is another important practice during the summer. It's best to operate aerators in the afternoon between 2–3 pm to promote water circulation, increase dissolved oxygen, and remove harmful gases. On hot or rainy days, avoid running aerators in the evening. Adjust aeration time based on weather conditions—extend it on hot days and shorten it when it's cooler. Aeration should never be done at night unless necessary, as it can disrupt the natural oxygen balance.
Adding fresh water helps replenish nutrients, flush out toxins, and restore the chemical balance in the pond. It is recommended to change or add new water every 10–15 days, with each addition being about one-third of the total pond volume. If water quality deteriorates significantly, one-third of the old water should be replaced with new water. Water changes should be done in the early afternoon, preferably between 2–3 pm, to avoid disrupting oxygen levels and causing stress to the fish.
Bottom mixing is also crucial for maintaining a healthy pond environment. This process involves loosening the sediment at the bottom to promote the breakdown of organic matter and release nutrients trapped in the mud. It can be done manually using long tools or by pulling ropes from the shore. Alternatively, bottom-dwelling fish species can naturally help mix the substrate. This activity should be carried out on clear, windy days to prevent excessive disturbance.
Feeding practices must also be carefully managed during the summer. Since fish are actively growing, they should be fed sufficient amounts to ensure they eat within two hours without overfeeding. Excess feed can lead to waste and water pollution. In addition, small amounts of fertilizer can be added to support plankton growth and maintain water clarity. Fertilizers such as manure, green manure, or chemical fertilizers should be applied at regular intervals—around 200 kg of manure, 300 kg of green manure, or 2 kg of urea per mu every 10 days. A balanced nitrogen-to-phosphorus ratio of 1:2 is ideal for maintaining good water quality.
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The Full-automatic Video Measuring Machine is an artificial intelligence modern optical non-contact measurement instrument developed based on the digital image measurement instrument (also known as CNC image instrument). The full-automatic video measuring machine inherits the excellent motion accuracy and motion control performance of digital instruments, integrates the design flexibility of machine software, and belongs to the forefront of optical size detection equipment today.
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