Grass carp, crucian carp, carp, silver carp and anchovy are all very good at a water depth of 10 meters. If you want to expand the income, you'd better choose the way of intercropping, that is, cutting several kinds of fish and raising them together, but the water layer where the fish live must be separated, so that they can ensure that they do not interfere with each other. Moreover, intercropped fish can sometimes complement each other. For example, some benthic fish can clean up the residual bait and keep the water clean, while filter-feeding fish can ensure that algae do not overgrow.

1. Grass carp: Grass carp is a herbivorous fish, which likes to live in the middle and lower layers of the water bottom and usually feeds on aquatic plants. Its temperament is very lively, and swimming speed is very fast, because it does not compete with other fish for food, and it has good economic value, so it is a common choice in intercropping fish.

2. Silver carp: Silver carp and grass carp belong to the four big fishes, but their habits are completely different. Silver carp belongs to the pelagic fish and is filter-feeding, which means that it mainly eats plankton, thus solving the problem of algae reproduction in water and purifying water quality to a certain extent.

3. Carp: Carp is a benthic fish, and it is also a common domestic fish. It is easy to raise, has miscellaneous feeding habits, and likes to find things under the water, so it has a very good maintenance effect on water quality. It is mixed with grass carp and silver carp, and will not affect the activities and feeding of the other two kinds of fish.