[Improve water quality] The pores of the sponge filter have a large surface area, where aerobic bacteria can spread. The culture of nitrifying bacteria can provide excellent biological filtration for your water tank. Betta fish, fry and other small fish will never be sucked into the filter. The slow flow of this filter is ideal for breeding and spawning discus, dwarf cichlids, guppies and dead fish. [Fine filtration] As the water passes through the pores, the The sponge traps dirt in your tank, making the water clear and transparent. It is very effective and can decompose toxic waste in the water tank. Easy to clean and reuse: the sponge can be used several times. When changing water, do not use tap water, but use water from the water tank for cleaning. Simply rinse and wring out several times until water runs out of the sponge. Versatility: This aquarium filter is small and can easily hide behind plants. It is suitable for any corner, very suitable for shrimp tanks, breeding tanks, fighting fish tanks, nano tanks, turtle tanks, fish tanks, goldfish, juvenile fish or other fish.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store