The effect of lime on filtering the effect of lime shrimp filtering ponds

According to aquaculture experts, the loading of lime into ponds – lagoons has many effects: to make pond mud have a loose texture, improve the air condition at the bottom, and accelerate the resolution process. organic matter in ponds, releasing N, P, K in mud, increasing nutrition; keep the pH stable.

Lime directly kills harmful organisms such as frog eggs, tadpoles, insects, snails, green moss and soft-bodied grasses, some kinds of fish such as perch and fruit fish. Therefore, lime plays a very important role in improving larval nursery ponds. Lime also destroys or restricts the growth of bacteria, viruses that cause redness, and ulcerative diseases in farmed fish.
Lime applied to the pond settles the colloidal organic matter suspended in the water, making the water clean. After each rain, water poured into the pond, or each time the water replenishes to the pond – the lagoon, the water is full of silt, the pond water is turbid to limit the lighting into the water, preventing the photosynthesis of aquatic plants. The pond is lacking of oxygen for fish and shrimp, it is necessary to use lime to adjust the clarity of pond water. If the clarity of pond water is below the permitted level, use 1kg / 100m2, mix in water and fall into the pond, the transparency will return to normal.
Lime applied to the pond has the effect of adjusting CO2 content. If the content exceeds 6mg / l, it is toxic to fish and shrimp. Through experiments showed that: Applying to pond 0,850mg CA (OH) 2 will reduce 1mg CO2, or in the experimental tank containing 25m3 of water with CO2 concentration of 25mg / l if you want to reduce it to 5mg / l from 320 to 350g.
 In fish and shrimp ponds in acid sulphate soils, there is often a phenomenon of leaching from pond banks after rain and acid sulphate from the bottom at the beginning of the rainy season. If there is always water in the pond, the phenomenon of alkali is negligible. Carry out the rehabilitation of acid sulphate soils as follows: At the beginning of the dry season, dry the pond bottom very carefully, can plow the pond bottom. Then fill the pond with brackish water and measure pH regularly. Carrying out salt-washing with lime until the pH is stable at 6, using lime at pond bottom 5-10kg / 100m2 and applying on the edge of the pond 0.5-1kg / m2 (lime), will improve pH at will want.

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