Prevention and Control Techniques for Bubble Disease of Freshwater Fish

Cause: The fish pond put too much unfermented fertilizer on the one hand, it continuously decomposes and consumes oxygen in the water. On the other hand, it releases many tiny methane and hydrogen sulfide gases. These small bubbles are eaten by the fry or attached to the body surface. When the bubbles accumulate to a certain amount, the fish body will lose its balance; in addition, the algae in the pond will multiply, and when the light is strong and the water temperature is high, the algae will have photosynthetic activity and make the dissolved oxygen in the water supersaturated, which can also cause bubble disease. happened. For example, when oxygen content in the water reaches 14.4 mg/L and saturation reaches 19.2%, bubble disease may occur in fry with a body length of 1 cm.

Symptoms The diseased fish floats on the water, stops when it floats, heads up and tails up, and the body loses its balance. Examination revealed that there were more bubbles on the fish's body surface, gill filaments and intestines. As the bubbles increased and the physical power was consumed, the fish lost its ability to swim freely and soon died.

Control methods: do not apply unfermented fertilizers, and grasp the amount of feed and fertilizer, do not make the water too fat. In case of air bubbles, new water should be added in time and part of the old water should be drained. 0.5 kg of salt per acre fish ponds Quanchiposa, but also a certain effect.

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