How to add oxygen to fish water?

Interception of water-with the help of air circulation and sunshine, the residual chlorine in water is volatilized and the dissolved oxygen in water is increased. The cooling time is more than 24 hours in summer, more than 48 hours in spring and autumn, and longer in winter. It's best to put tap water in an open and ventilated place, and oxygen will dissolve into the water through the water meter-what about trapping water with mineral water bottles?

Many fish friends like to use an air pump to increase oxygen, thinking that as long as there are many bubbles, the oxygen content will be high. Let's first understand the working principle of the air pump. The air pump pushes out a lot of bubbles through the trachea and gas stone, but these are just air, so the bubbles in the water can't increase the oxygen content. When bubbles rise to the surface and burst, the skin of water will be torn at the moment of bursting, and oxygen will enter the water at this time. Therefore, the undulating water surface can bring a lot of oxygen. This is also the reason why trickling filtration (overflow) and other filtration methods are more suitable for nitrification than top filtration, filter barrel and other filtration methods, because the top-down water surface in the filter tank is constantly torn, so there will be more oxygen.

I suggest you add a pump to the fish tank. It's simple. It can make water flow and increase oxygen. The effect is very good, more than ten yuan. This is much better than stirring the water yourself.