1. Trapped water: To raise water, it is necessary to trap water first. The method of trapped water is very simple, as long as the water is connected, put it in a sunny place and dry it for a few days. Usually, it is dried for one day in summer, two days in spring and autumn and three days in winter. The reason why the water is trapped is that the water contains chlorine, which needs to be removed in this way.

2. Filtration: In order to ensure the cleanliness of the water body, it is best to filter the trapped water several times. After injecting the water into the fish tank, turn on the filter and filter it continuously for several hours to ensure that the impurities in the water are filtered out, so that the water is more suitable for the growth of fish. If it is not filtered, the water body may become turbid and affect the viewing.

3. Culture of bacteria: Clean water is only one aspect, and more important is the culture of beneficial bacteria. Usually, nitrifying bacteria are cultivated, which can convert ammonia nitrogen into nitrate, thus preventing fish from being poisoned, and is an indispensable part of ecological cycle. Cultivating bacteria requires pouring nitrifying bacteria every week, turning off the lights and exploding oxygen into the water to promote its reproduction.

There are many benefits of raising water. First, it can increase the water temperature. Koi fish belongs to temperature-changing animals, and a higher temperature is more helpful for its growth. Secondly, raising water can improve the dissolved oxygen of water body, which is also helpful to the respiration of koi fish. In addition, the most important thing to trap water is to cultivate nitrifying bacteria.