There are too many nutrients in the water, and the water body does not flow. When it is hot every day in summer, algae and aquatic plants are likely to grow wildly, which will not affect your fishing, but also affect the growth of fish.

Because it is an old fish pond, the water will not necessarily change, and the long-term accumulation of nutrients will lead to the deterioration of water quality and the proliferation of algae and aquatic plants.

Suggestion: 1, change the water for the fish pond.

2, pesticide weeding or artificial weeding

3, clear the pond in winter, change water to raise next year.