Cold boiled water cannot raise fish. After heating the boiled water itself, although impurities will be filtered out and the hardness of the water will be reduced, the oxygen in the water will be basically lost after boiling, so that there is no oxygen in the water, which will pose a great threat to the breathing of fish. If you want to use it to raise fish, you need to use an oxygen pump to oxygenate water for a period of time to ensure sufficient dissolved oxygen in the water.

1. Drying: The most commonly used method for raising water is drying. After connecting the water, put it in a sunny place for 1-3 days, and basically it can be used after 3 days. It should be noted that if there is no sun, it is necessary to let the water stand for about a week. In addition, if the drying time is too long, harmful bacteria will enter it, and such water will also be harmful to the health of fish.

2. Aeration: Aeration to nourish water is a relatively fast method. Compared with drying, the dosage will be smaller, but it saves time. Prepare an oxygen pump, one end of which is introduced into the cylinder, and then oxygenate it. Oxygenation can not only remove chlorine, but also increase the oxygen content in water.

3. Medication: The main purpose of medication is to remove chlorine, but this method is rarely used at home, usually in aquarium shops. Because there is more water, other methods are too inefficient, so it is directly used in water.