Leakage increases the cost of fish culture Seven ways to prevent leakage in fish ponds

Leakage in fish ponds directly affects the survival of fish, which not only increases the feed coefficient, water and electricity charges and culture costs, but also leads to slow growth, more diseases and high mortality. Mariculturists can take advantage of the off-pond period to find out the causes and carry out repairs according to different leakage conditions. Here are seven ways to prevent leakage from fish ponds:

Anti-leakage of fish ponds

Dredging and deep excavation method: some fish ponds are in disrepair, the silt at the bottom of the pond accumulates deeply, and the pond slope collapses and leaks. Once the weather is dry and the pond water evaporates, it is easy to cause the phenomenon of anoxic floating head of fish. For this kind of fish pond, after fishing, it is necessary to make reasonable planning, clear silt and dig deeply, so as to keep the water depth above 2 meters.

Mud seepage plugging method: for general leaking fish ponds, after cleaning the pond, first lay a layer of fine crushed clay at the bottom of the pond, and then inject water, so that the clay is evenly spread on the bottom of the pond by water flow, so as to protect the bottom and block the leakage, or add an appropriate amount of water to stir the clay into mud and let it seep into the gap of soil particles at the bottom of the pond to reduce water permeability.

Clay matting method: for fish ponds with high sand content, first drain the pond water, dig out silt sundries, air for 15 minutes and 20 days, evenly lay 15-20cm thick clay on the bottom of the pond and the slope, and then use mechanical compaction or tamping. In addition, some grass seeds can be sprinkled on the slope to protect the slope with turf.

Rolling slope bottom method: for old fish ponds or newly dug fish ponds with large area, mechanical compaction can be used according to the infiltration area and degree, or planing the leaking part of the pond bottom soil, adding appropriate amount of clay or quicklime, stirring evenly, and then rolling.

Brick-ash lining method: for fish ponds with serious leakage, the pond water should be drained first, silt should be cleared and dried for a few days, and then the pond bottom and slope should be consolidated. The slope is lined with mortar and the surface is flattened with cement to make it smooth and seamless. If possible, the square cement slab can be prefabricated and the pool slope can be paved. The gap between the slopes is filled and smoothed with cement; the bottom of the pool is rolled with 20cm-thick clay and quicklime, or evenly covered with 30cm-thick clay, after adding appropriate amount of water, it is stirred by machinery to dry itself, and a protective layer is formed after hardening.

Laying thin film method: for small intensive fish ponds, the four slopes can be flattened and compacted. First use thin mud to wipe 2-3cm thick, and then layer plastic film, the lower end of the film is buried in the bottom of the pool about 15cm, the upper end is compacted with soil; the bottom of the pool is rolled with clay and quicklime, or evenly covered with 20-30cm thick clay, add water or human feces and urine, stir into a mud shape, let it naturally infiltrate and dry, so that it is better not to leak.

The method of hanging and silting with water: for fish ponds with water and fish, you can use woven bags or close-eye mesh bags to fill loam or clay, tie one end with rope, let the cloth bag draw the bottom, and pull repeatedly in the fish pond, including the bottom and ridge of the pond. When the cloth bag feels light, clay should be added again, and the fish pond that has been put should first pull the pond's 1pm 2, and then pull the other half.