Fish farming is generally more profitable because it is different from raising cattle and sheep. For example, the cost of raising an acre of grass carp is around 500 yuan, and the annual output of grass carp can reach about 500 kg. The price is 10 yuan/kg, and the income is about 5,000 yuan. After deducting the cost of raising grass carp, the profit is about 4500 yuan. Moreover, fish farming in fish ponds is not single. Besides grass carp, you can also put silver carp, herring and crucian carp.

1. Based on an acre of fish pond, the yield of an acre of fish pond is about 8000 kg, including 300 kg of silver carp, 500 kg of grass carp and 0/00 kg of bream/kloc. The prices of these fish are different. Generally, the price of silver carp is around 1 kg 5 yuan, and the income is 1500 yuan.

2. The price of bream is 4 yuan/kg, and the net profit is 400 yuan. The price of grass carp is relatively expensive, about 7 yuan/kg, and the income of grass carp can reach 3,500 yuan. If all of them are added up, the gross income of 1 mu pond is 5400 yuan, and the net income of 1 mu pond can reach 5000 yuan, so the profit of 5 mu pond is about 25,000 yuan.