The water in the small fish tank is relatively small, and the water quality is not good to maintain. Generally, it should be changed once every three to four days. Of course, if there are not many fish and the water quality deteriorates quickly, it can also be changed once a week. It should be noted that each time do not change more water, generally change one fifth of it, the more frequent the water change, the less water change, so as to avoid large fluctuations in water quality, affecting the health of fish.
1. Water quality aging: If you do not change the water for a long time, the first problem you have to face is the aging of the water quality. Although the aging water quality is not necessarily turbid, harmful substances invisible to the naked eye will gradually accumulate in the water. Although such water can raise live fish, if it is not raised well, it will easily lead to the fish not growing up. Become an old fish.
2. Insufficient oxygen: In the process of changing water, some gas will enter with the water, which can supplement oxygen. Because fish also need to breathe in the water, if the water is not changed for a long time, the dissolved oxygen in the water will be reduced, and if there is no other way to supplement oxygen, it will lead to the death of fish.
3. Easy to explode algae: As mentioned above, not changing the water will lead to the aging of water quality, in which harmful substances increase. Although these substances are harmful to fish, they are essential components for the growth of algae. Therefore, not changing the water frequently can easily lead to the outbreak of algae, which will not only affect the appearance, but also increase the consumption of oxygen.
