BioPress Set 4000 by Oase (UK) LtdProduct characteristics at a glance: Clear water guaranteed through the ideal combination of filter, pump and UVC technology Easy cleaning via the cleaning function integrated in the cover The filter can be almost completely buried for almost invisible integration in the environment Suitable for ponds up to 4,000 litres Quick release provides easy filter opening and closing for maintenance purposes A higher elevated watercourse can be supplied with