SUNSUN Aquarium external filter 6W 400 l/h HW-603B

The SUNSUN HW-603B is a compact external filter designed for aquariums up to 0.6 m tall or lower. Its 6 W pump delivers a flow rate of up to 400 l/h, keeping the water circulating and filtered throughout the tank. A maximum lift height of 0.85 m suits the aquariums this model is built for.

Water passes vertically through five filter stages: a blue sponge traps debris, a yellow sponge catches fine particles, a black sponge removes colloidal residue, and a white non-woven layer clears discolouration. Above the cartridges, a space supports nitrifying bacteria that help maintain the tank's biological balance.

The transparent housing lets you check the state of the filter cartridges without taking the unit apart, so you know when cleaning is due. The set includes two 1.5 m flexible 12 mm hoses, flow-regulating shut-off valves, an intake tube with protective basket, a multi-hole spray bar, a flat nozzle and suction cups for mounting.