This combo gravity filter from Ultrazap includes an 8 watt UV sterlizer, 25 L Bio Filter and a solid separator filter with foam. This gravity filter is a compact solution for a koi pond or fish tank with a volume of 4000 litre (35l/min). Ensure correct flow rate to avoid overflow.
Gravity Filters must be installed so that the bottom is at least 20 cm above the water level in the pond/fishtank
Supplied with foam, gauze and bioballs