Fish tank lights are generally turned on during the day. The time of using the lights should not exceed 10 hours, and the lights should not be turned on and off frequently during this period. However, when fish are spawning, reproducing, or infected with diseases, it is best to turn on the lights at night to observe the situation to avoid irreversible accidents. In addition, owners who often use water purifiers need to pay attention to the fact that they must use lights at night, otherwise they will easily become hypoxic.

Notes on adding new fish to the fish tank:

1. Newly purchased fish are generally packed in packaging bags. Do not open the bag immediately and separate the fish and packaging. The entire bag is immersed in the fish tank in order to achieve the purpose of overheating. Generally, it takes 10-20 minutes to overheat. The main reason is to avoid the large difference between the water temperature in the tank and the water temperature in the packaging bag when passing through water, which may cause a stress reaction in the fish.

2. Pay attention to changing the water in the fish tank every day. If the water is in good condition, change it twice a week.

3. Pay attention to the status of the fish every day. If there is a fish that does not eat or lies in a corner, you must consider whether the fish is sick and seek treatment in time. If you see fish rubbing against the fish tank, it usually means that the fish has parasites. Then just take the fish out separately and put them in a water basin to kill the parasites.

4. When placing fish in the fish tank, the size of the water body and the efficiency of the filtration system should be considered. Generally, the fish density should not be too high.

5. You can choose to add salt when new fish enter the tank, but you must pay attention to the amount. Of course, you can also follow the measures of other aquarists to complete the operation of adding new fish to the tank.