How high is the water level in the fish tank?

The water level is preferably not higher than 40 cm. The water level of the fish tank directly leads to three differences in the fish tank. Different oxygen content, the higher the water level, the lower the oxygen content at the bottom. The other is the difference in water pressure. The deeper the water body, the greater the water pressure. The third is the difference in waters. The higher the water level, the larger the water area.

In the juvenile stage, if the water level is too deep, the water pressure is too high, and the water flow is too fast, it is easy to cause the deformity of juvenile fish fry, which may happen to goldfish koi fish, betta fish fry and guppy fish fry. But if the water level is low, it will be bad for these ornamental fish. Even if the water level is too high and the water body is too large, the sense of urgency of young arowana will probably increase. If the water level of sub-adult colorful angelfish is too small, they can't be in good condition.

Extended data:

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. Fish water must be stored for several days, and attention should be paid to how many fish are raised. If the fish tank is not very big, don't raise so many fish.