Purified water in barrels is not suitable for fish farming.

The reasons why you cannot raise fish in bottled purified water:

1. Bottled purified water does not contain oxygen, and fish will die due to rapid lack of oxygen.

2. Although purified water does not contain harmful bacteria, it also does not contain beneficial bacteria. It lacks minerals, microorganisms, trace elements and other ingredients and is not suitable for the growth of fish.

3. You can choose well water, river water and tap water for fish farming. As long as the tap water is slightly treated and placed in the sun, the chlorine in it can be eliminated without causing harm to the fish.

Notes on raising fish:

1. Feed in appropriate amounts and stop after eight minutes. When raising fish, ensure that there is sufficient food, pay attention to feeding in appropriate amounts, and feed the fish in an amount that can be eaten within 5-10 minutes. The frequency of feeding should be determined based on the number of fish being raised. Try not to feed at night or on cloudy days.

2. Change the water regularly with a moderate amount of water. The frequency of water changes should be determined according to the habits of the species being raised. Generally, it should be changed every 7-10 days. This can not only ensure the cleanliness of the water, but also ensure the oxygen content of the water. Be careful not to let the water temperature and water quality change too much every time you change the water.

3. The filter material for filtration should be stable and the cleaning frequency should not be too frequent. Replacement and cleaning should be done 1/3 of the time. It is recommended to only wash the front filter cotton to ensure that the nitrifying bacteria that have been established on the filter material are not destroyed.

4. The water temperature for fish farming should be moderate, and the water temperature should be adjusted according to the species of fish being raised. For example, tropical fish need a higher temperature than ordinary fish.

5. Fish have different water quality and cannot be mixed. Some fish cannot be kept together. If kept together, they may fight or even die. For example, carnivorous fish and herbivorous fish cannot be mixed, tropical fish with different attributes cannot be mixed, etc. It is recommended to choose fish with similar habits and docile temperaments for mixed breeding.

6. The smaller the fish tank, the higher the difficulty. It is recommended that novices choose a larger tank when starting out.

7. Pay attention to the stocking density. Generally speaking, the fish size is 1 cm in 1 liter of water. In sufficient space, fish will be more active and in better shape.

8. The bait must be clean, otherwise it will easily lead to fish diseases.

9. Try not to keep fish in the bedroom, because the fish tank emits a lot of water vapor, which increases the indoor humidity and easily breeds mold, leading to biological pollution. Moreover, the air pump of the fish tank also produces noise, which affects sleep.

10. Pay attention to indoor ventilation and air purification.