What should I do if there are always red nematodes crawling out of the sewer in the swimming pool?

The red nematodes are earthworms. Using high-efficiency cypermethrin, such as 5% Gong Rui, can effectively eliminate the harm of red nematodes.

Cypermethrin has a good effect on pests such as LEPIDOPTERA, COLEOPTERA and Hemiptera, as well as spider mites, rust mites, gall mites and tarsiers. Can be used for treating cotton bollworm, cotton bollworm, cabbage caterpillar, vegetable aphid, tea geometrid, tea caterpillar, etc.

Extended data

Earthworms mostly live in the silt on the bank or bottom of the river, and are concentrated on the surface of the silt. One end is fixed in the sludge, and the other end extends out of the sludge and vibrates in the water. When it is disturbed, it will immediately shrink back into the sludge. The reproductive capacity increases with the increase of temperature. Earthworms have extremely high nutritional value, so they should be washed repeatedly with clear water before feeding. It is the favorite bait for goldfish and koi fish, and also the main bait for eel fry.

After the low tide of Huangpu River in Shanghai, a large number of water worms were born in the silt on the shore, and a large number of people caught them every spring and autumn. Experts believe that the red nematode is not a parasite, although it will not directly harm the human body, but because it carries bacteria, and its excrement will cause gastrointestinal discomfort.

Baidu encyclopedia-beta-cypermethrin

Baidu encyclopedia-water earthworm