If you want to make the fish tank grow moss, you must first ensure that the water body has certain fertility, and you can increase the feeding amount at ordinary times, so that the residual bait and feces in the water will increase, which will make it show eutrophication. Secondly, it needs a certain amount of light. The growth of moss can not be separated from the sun. If the light is insufficient, it is not easy to grow moss, but it will promote the reproduction of brown algae.

1. Purifying water quality: The growth of moss itself indicates that the water body is eutrophic. In this case, the ammonia nitrogen content in the water body is high, which is harmful to the health of fish. After having moss, it can absorb it, which can not only avoid fish poisoning, but also provide nutrition for itself, so it is equivalent to purifying water quality.

2. Feed: Moss is also a good food in water, because most fish are omnivorous, so you can eat moss as green feed and have certain nutrition. However, it is not that there is no need to feed with moss. The nutrition of moss is not enough, and it also needs certain fertility of water body.

3. Increase dissolved oxygen: Moss, as a plant, also contains chlorophyll, so it can carry out photosynthesis, which can release certain oxygen. Improving dissolved oxygen in water is very helpful for fish to breathe, but it is only effective during the day, and oxygen will be consumed if there is no light at night.