For years, Long An agricultural sector is often recommended shrimp farmers do not drop case against (time drop from July to October), because this crop is often hidden environmental risks from water, contagious the first disease to be the main crop. However, the shrimp are often highly negative, so many farmers in districts like the Can Giuoc, Duoc, Tan Tru and Chau Thanh still farming.
The important thing is the protection against the determination of shrimp known to apply the safety measures brought in more for the shrimp. Prominent of which is the level of agricultural wells, water wells for the inverse shrimp, concentrated in Tan Tru and Chau Thanh district. Movement of water wells shrimp appeared in Long An from 3-4 years. Pham Van Canh, farmers in the village Advantage (Nhut Ninh, Tan Tru) said, the reason people have to dig wells for water shrimp culture is negative due to contaminated river water, it takes a lot of costs Water treatment prior to adoption. Shrimp in the river water also face high risks because of easy "pick" other diseases due to waste ponds into shrimp ponds their home.