The problem of mosquitoes becomes more severe in summer and in monsoon, cases like dengue and malaria also start occurring. Because of this, sometimes the situation can become very serious. These mosquitoes mostly breed in clean water. Like in cooler tanks, tires or empty containers. The way to prevent this is to not allow water to accumulate anywhere. This is the reason why it is advised to keep changing the water in the cooler. If you put some natural things in the cooler tank, it prevents mosquito larvae from breeding.
You can remove water from places like tyres, pots, boxes, but in summer you have to run the cooler. Sometimes it can become home to mosquito larvae. Actually, you can change the water, but it is not possible to keep it completely dry in summer. Know in this article which are the three things that will keep the water in your cooler tank clean and mosquito larvae will not breed.
Put 1 piece of alum in cooler water. This is a great ingredient to clean water naturally. Alum keeps the water in your cooler clean, which not only prevents the growth of mosquito larvae but also cools the air. Actually, the dirt present in the water starts blocking the cooler pads i.e. grass. In such a situation, alum will keep the water clean and cool air will also come.
You can put fresh neem leaves in the cooler. These have antibacterial properties which reduce the chances of mosquitoes and any other kind of insect breeding. If you want, you can also put neem oil in the cooler tank instead of neem leaves. Even this does not prevent mosquito larvae from growing.

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Bleaching powder is also not very expensive in the market. It is mostly used to clean water. It will not only clean the water, but also cleans the dirt accumulated in your tank. You put 1 teaspoon bleaching powder in the tank of your cooler. Mosquitoes do not breed from this./