How to prevent and control diseases of pollution-free fish

Animal and plant symbiosis aquatic plants and fish symbiosis in the same pond, fish rarely get sick. The aquatic plants planted in the fish pond are rice or lotus root, which are in the east-west direction, with a wide row spacing (more than 33 cm), accounting for no more than 50% of the total area of the water body, so that the lighting effect is good, and the water depth depends on the water tolerance of aquatic plants. Rice is generally less than 30 cm, and lotus root can reach more than 50 cm. Farmed fish can be conventional, famous and special new species. Breeding methods can be used for seedling cultivation and adult fish culture. As the residual bait and fish feces are deposited at the bottom of the pond and fermented and rotted, it not only pollutes the water quality, but also is easy to breed harmful pathogens. On the other hand, aquatic plants can be absorbed as fertilizer, eliminating the breeding place of pathogens, so the incidence of fish is low.

Chinese herbal medicine is sprinkled on the hillsides, streams and roadsides of the countryside, there are many Chinese herbal medicines, such as pine needles, camphor leaves, sesame willow leaves, neem, water Jupu, gallnut, etc., when dead fish float on the surface of the fish pond, fish suddenly stop eating for non-weather reasons, and when some fish leave the group and swim alone, the above Chinese herbal medicine can be collected or regularly collected, 15,30kg per mu, in a big pot at the edge of the pool, cut the collected Chinese herbal medicine into inch-long sections and put them into the pot. Add clean water to boil, after boiling, even flooded with water sprinkled into the pond, 12 hours later, the water color becomes brown, non-toxic and harmless to fish and water quality, and will quickly control the possible spread of potential fish diseases or prevent the occurrence of fish diseases.

In the practice of ecological disease prevention, it is found that in the fish pond ecosystem, if there are more biological species, the more complex the ecosystem is, the stronger the disease resistance of the system is. If there are few species in the fish pond, the proportion of a single species is more than 50%, and this species is often prone to disease. And multi-species culture: grass carp, carp, Qing fish, big mouth catfish, mullet, silver carp, Chinese soft-shelled turtle, turtle, eel and the inevitable wild miscellaneous fish, snail lion and clam shell coexist in the same pond, and each species has different niche. There is a complex food chain relationship. Due to the "Gill effect", carp and crucian carp seek for food to dig the bottom of the pond, destroying the easy breeding environment of pathogens, and the diseased fish are eaten by carnivorous fish because of their slow action. Cut off the transmission of pathogens, the ecosystem automatically prevent disease, so the incidence of pool is low.

After years of observation on toad prevention of fish disease, there are more toads in and around the fish pond, and the pond @ # @ 233 fish fish seldom get sick, because toad can dig out and kill the pathogens in the pond. In the fish pond where it is not easy to escape, the toad can be caught directly, while the fish pond that is easy to escape is enclosed with bamboo baskets or net pockets, and the location is better at the water inlet, more than 5 per mu. The captive toad had better be released after 3 days so as not to die. The toad has more plants in the riverside areas of the town, but it can be found by flashlight at night. It is not strong in escape ability and is easy to catch. After 2 or 3 years of catching toads to prevent and control fish diseases, and then released, the toads in and around the pond will increase year by year, which can effectively prevent the occurrence of fish pond diseases.