How to distinguish between flooding pond and poisoning in fish culture?

Although there are similarities in fish flooding pond and poisoning, there are still obvious differences in careful identification, mastering their respective characteristics, accurate identification, correct diagnosis and then prescribing the right medicine for effective treatment. How to distinguish between floodpond and poisoning? Through the detailed introduction of the article, I hope it will be helpful to you.

1. In terms of time of occurrence

Fantang: it often occurs in the middle of summer and early autumn, especially when there is no rain, short thunderstorm and muggy weather, or continuous rain.

Poisoning: there is no difference between day and night, it mostly occurs in the season of crop disease prevention and the busy period of industry.

two。 Differ in terms of symptoms

Fantang: the mild symptom is the slow response of fish when they are frightened. During severe hypoxia, fish swim wildly or lie on the surface of the water or hit their heads on the edge of the pond or belly up and die.

Poisoning: the phenomenon of floating head is not obvious, and the symptoms are different due to different toxic drugs. Some are characterized by collision, wild swimming or fast circular swimming, slow movement or paralysis after the exciting period, and death from the bottom; some have increased mucus secretion on the body surface, congestion and inflammation on the body surface or abdomen or dorsal fin, and the body color is black or purple; or the fish gills turn purple, the eyeball is protruding, the pupil shrinks, and the fundus cornea appears more blood spots; or fish scales are loosely set up and easy to fall off. Some organs turned out to be enlargement of liver and kidney, dilatation of blood vessels in the liver and congestion. Slow heartbeat, decreased respiratory function; some pectoral fins extended to the front position, tail trembling, spine may be bent, deformed and so on.

3. In terms of the species of dead fish

Fantang: generally speaking, pelagic fishes are more common, such as silver carp, bighead carp, Wuchang fish and so on. Carp and crucian carp are generally not easy to die in the pond. When a fish floats its head, it usually kills the big fish first and then the small ones.

Poisoning: generally regardless of species and size, even carp, crucian carp, and even rice field eel and Loach will die. In severe cases, all the fish in the pond die.

4. Differ from the color of the water body

Floodpond: due to no regular injection of new water or water transfer and other reasons, resulting in excessive fertilizer of the pond water, the production of a large number of blue-green algae, so that the pond water is dark green, blue-green, in case of sudden weather, it is easy to flood the pond.

Poisoning: the water quality changes greatly in a short time, often accompanied by a strange smell, such as blackening, then turning clear, smelling, and asking a pungent fishy smell far from the edge of the pool and downwind.

5. Difference in the effect of rescue

Fantang: if the owner of the pond can often patrol the pond and immediately take rescue measures, such as putting oxygen-increasing drugs, turning on the aerator in time, pouring new water, etc., most of the economic losses can be recovered.

Poisoning: generally, there is no special method, only fresh water can be infused immediately, except for the relative concentration of harmful substances in the pool, the loss is relatively large.