It is forbidden to turn on the aerator during the day in rainy days, because although the photosynthesis is poor in rainy days, the natural aeration effect is very good. Natural oxygenation mainly comes from the fact that raindrops fully contact with the air before falling, dissolving more oxygen. When it rains, the water surface waves and scales, which also promotes the oxygenation of the water body.

The effect of natural oxygenation is much stronger than mechanical oxygenation. At the same time, natural oxygenation will make oxygen mainly stay on the surface of fish ponds. This little oxygen should be stored on the surface of the fish pond for fish to use at night. If the machine is turned on during the day in rainy days, only a little dissolved oxygen is stirred to the bottom of the pool to be used by organic matter, and the dissolved oxygen in the pool can not be replenished enough at night, which may easily lead to hypoxia.

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Fish tank fish culture skills:

You can keep the fish half hungry every day, so that the digestion will be faster. Feed the fish once a day, don't feed too much at a time, and ensure that the fish are more active. Ensure that the feed is fresh, ensure that they are nutritionally balanced, and set a good time to feed. Do not change the time at will. You can choose a fixed place to feed every time.

Can't use raw water. Raw water is tap water that has not been dried. The water temperature in the fish tank is too different. You can choose to change the water once a week without changing it too often. When changing water, put it in the sun for a few days to keep the water temperature similar to that of a fish tank.

Tap water needs to be dried for several days, and the water temperature in the fish tank is the same. It is best to use old water to raise fish, because there are more green algae in old water, which is also a very good auxiliary feed for goldfish. If it is found that the color of old green water turns to clear water and there are a lot of green algae under the tank, it is necessary to replace this water in time. This kind of water makes fish sick easily. The water changed for fish must be stored for several days, and attention should be paid to how many fish to raise.