Treatment Methods and Emergency Measures for Fish Pond Oxygen Depletion
Treatment Methods for Fish Pond Oxygen Depletion
Treatment Methods for Fish Pond Oxygen Depletion
Whenever the seasons change and clear weather turns to overcast, the air pressure often drops and dissolved oxygen in the water decreases. At such times, not only should the amount of fertilizer applied that day be appropriately reduced, but close attention must also be paid to fish activity, strictly guarding against fish dying from oxygen depletion when severe surfacing occurs. Once severe surfacing of fish is discovered, emergency rescue must be carried out promptly. Without aerators, the following traditional methods can be used:
1. Flush large amounts of fresh water into the pond.
2. Splash yellow mud and salt water into the pond. For each mu, use 4 kg of yellow mud and 4 kg of salt, mix well with water, and splash over the entire pond.
3. Drain water from one side of the pond while adding fresh water at the same time.
4. Splash alum water into the pond. For each mu, use 1 kg of alum, crush it into powder, add an appropriate amount of water, stir well, and splash over the entire pond.
5. For each mu, use 15 kg of quicklime, dissolve it into a slurry, and splash over the entire pond.
6. For each mu, use 2 kg of gypsum, dissolve it in water, and splash over the entire pond.
The above methods are for temporary emergency rescue, but to fundamentally prevent and control fish surfacing, the following preventive and control measures should also be taken:
① Frequently add fresh water to the pond (before 2-3 PM; not advisable in the evening). ② When signs of surfacing are detected, stop fertilizing and control food intake. ③ Stocking density should not be too high. ④ Persist in patrolling the pond, paying special attention to changes in water color, and prevent the pond water from becoming both murky and turbid.
Whenever the seasons change and clear weather turns to overcast, the air pressure often drops and dissolved oxygen in the water decreases. At such times, not only should the amount of fertilizer applied that day be appropriately reduced, but close attention must also be paid to fish activity, strictly guarding against fish dying from oxygen depletion when severe surfacing occurs. Once severe surfacing of fish is discovered, emergency rescue must be carried out promptly. Without aerators, the following traditional methods can be used:
1. Flush large amounts of fresh water into the pond.
2. Splash yellow mud and salt water into the pond. For each mu, use 4 kg of yellow mud and 4 kg of salt, mix well with water, and splash over the entire pond.
3. Drain water from one side of the pond while adding fresh water at the same time.
4. Splash alum water into the pond. For each mu, use 1 kg of alum, crush it into powder, add an appropriate amount of water, stir well, and splash over the entire pond.
5. For each mu, use 15 kg of quicklime, dissolve it into a slurry, and splash over the entire pond.
6. For each mu, use 2 kg of gypsum, dissolve it in water, and splash over the entire pond.
The above methods are for temporary emergency rescue, but to fundamentally prevent and control fish surfacing, the following preventive and control measures should also be taken:
① Frequently add fresh water to the pond (before 2-3 PM; not advisable in the evening). ② When signs of surfacing are detected, stop fertilizing and control food intake. ③ Stocking density should not be too high. ④ Persist in patrolling the pond, paying special attention to changes in water color, and prevent the pond water from becoming both murky and turbid.