1. Large suction hole - surround water absorption: the aquarium sump pump bottom is surrounded by water absorption design, which can suck in large particles of impurities and fish manure. 2. Low water level to new height: low water level design, can pump water level as low as 5mm pumping water more thoroughly. 3. Large flow-High pressure: quickly pump and change the water in the fish tank, high pressure to cope with deep-water fish tanks.