The time to change the water in the fish tank is usually in the afternoon, usually after 4 o'clock. Generally, the latest time to feed the fish is 3 o'clock in the afternoon. Therefore, at this time, the fish have eaten enough and have been swimming for a while. Changing the water at this time can also clean up some dirt at the bottom of the tank. Usually spring and autumn water change once a week, summer temperature is high, water quality deterioration is fast, so it needs three or four days to change, winter can change once half a month.
1. There are bubbles on the water surface: Generally speaking, there will be no bubbles on the water surface. The bubbles represent that the protein content in the water body exceeds the standard. If the water is not changed in time, it may lead to a large number of microbial reproduction, or algae explosion. Therefore, once a large number of bubbles are found floating on the surface, We need to change the water immediately.
2. Appearance of protein worms: In addition to the foam on the water surface, the appearance of protein worms in the water also indicates that the water quality is too rich. Although this kind of organism will not cause any harm when the number is small, once it increases, it will cause discomfort to the fish, and even cause them to be infected with diseases. Therefore, it is necessary to change the water as soon as it is found.
3. Cyclops increase: Cyclops, like proteids, are also plankton in the water, but their size is smaller and generally invisible. However, if you see the phenomenon of fish rubbing the tank, it is possible that its number is erupting, at this time also need to change water.
