1、Suitable for small fish tank 125L and below, has the functions of inhibiting algae reproduction, promoting the growth of water plants, protecting fish and shrimp, continuously killing pathogens, preventing biological diseases and etc. Through bluetooth connection and App control, the operation steps are simplified and the user's operation experience is greatly improved. 2、It has strong effect on inhibiting the occurrence of green algae and promoting the growth of water plants. 3、Kill the pathogens in water , greatly improving the survival rate of young shrimp. 4、Can coexist with beneficial bacteria, no residual toxicity, minimal effect on aerobic beneficial bacteria. 5、Automatically set up the algorithm according to the aquarium environment, different bactericidal intension and operation cycle are used according to the different ecological environments of the initial, middle and final s of the aquarium. 6、Download the APP, set the TDS value and the tank capacity to automatically run at intervals and automatic operation all day.