Profits:
1. Scavengers can help remove debris, food scraps and other dirt from the bottom of the fish tank and keep it clean.
2. Scavenger can promote water circulation and oxygen supply, which helps to maintain the ecological balance in the fish tank.
3. Scavenger can reduce the decomposition of organic waste in the aquarium, reduce the accumulation of harmful substances such as ammonia nitrogen and nitrite, and improve the quality of water.
4. Scavenger can also prevent the dirt at the bottom of the aquarium from generating bad odor and enhance the ornamental value.
Cons:
1. The scavenger may eat small benthic organisms in the fish tank, such as worms, small crustaceans, etc., which may affect the ecosystem.
2. The existence of scavengers needs to provide enough food, if there is not enough food in the tank, the scavengers may attack each other or find other fish to feed on.
3. Too many scavengers may negatively affect the ecological balance in the aquarium, such as over-cleaning resulting in too clear water, which affects the fish's living environment.