the yellow film on the water surface of the fish pond? If there is yellow film on the water surface of the fish pond, it can be removed by artificial fishing. It should be noted that there are many reasons for the yellow film, which may be caused by the yellow mud outside the fish pond entering the pond mud when it rains or rises, and this situation needs to be improved by changing the water. It may also be because there are too many algae in the fish pond, which rot after a large number of deaths, and can be eliminated with algaecide in advance.
1. Water injection and water change: not only fish tank fish farming needs water change, but also fish pond fish farming needs water injection and water change. Because the area of fish pond is relatively large, water is easy to evaporate, so water should be added regularly, which can not only bring oxygen, but also supplement nutrients, while increasing the space for fish activities. To change water is to drain the old water and then add new water, usually once every 7-10 days.
2. Proper oxygenation: oxygenation can not only improve the dissolved oxygen, but also make the upper and lower water bodies convect, thus promoting the release of some nutrients at the bottom of the pool, which is of great help to maintain the water quality. The aerator is usually turned on at noon on sunny days, in the morning on cloudy days and in the middle of the night on rainy days.
3. Scientific feeding: If the feeding is unreasonable, it will also cause certain pollution to the water quality. Usually to choose high-quality feed, because fish ponds usually use feeding machines to feed fish, so the arrangement of density is also exquisite, generally less than 15 mu of fish ponds every two mu of a feeding machine, more than 15 mu every four to five mu can be equipped with one.
