The excrement of Ampullaria gigas usually does not pollute the water quality, because they are rich in microorganisms and various bacteria, which can decompose organic matter and convert it into nutrients such as nitrogen and phosphorus in water. These nutrients are beneficial to aquatic plants and plankton, and can also be eaten by other fish and aquatic organisms.

However, if a large number of snails die, harmful gases such as ammonia and hydrogen sulfide may be produced, which will have a negative impact on water quality. Therefore, if apple snails are found dead or dead in large numbers, it is suggested to clean up and change water in time.

In addition, if the snails multiply in large numbers, it may have a negative impact on the water quality. This is because the excessive reproduction of Ampullaria canaliculata will lead to insufficient oxygen in the water and affect the growth and reproduction of other organisms. In addition, the excessive reproduction of Ampullaria canaliculata may also lead to the deterioration of water quality and produce harmful gases such as ammonia and hydrogen sulfide.

Therefore, while maintaining aquatic life and water quality, the number and reproduction of Ampullaria canaliculata must be controlled. The number and reproduction of Ampullaria canaliculata can be controlled by controlling temperature, food intake, increasing water flow and reducing light time. At the same time, changing water regularly and using filters are also important measures to maintain water quality.