Bacteria room, water temperature, etc. Should be adjusted:
Dead fish should be cleaned up quickly; Avoiding "man-made" destruction of water quality is mainly manifested in the wrong feeding method and poor grasp of the food intake of parent fish, which leads to the formation of a large amount of ammonia in the residual water of excessive fish feed.
Another is publicity, which is very important. You can do some group buying or something.
The most important thing is the location of the store and the competition in the local market. )