Oase BioPress Pressure Pond FilterCombine mechanical and biological filtration with UVC clarification in the Oase BioPress pressure filter. Choose the 4000, 6000 or 10000 for your pond and connect it to a suitable pond pump, sold separately.Key Benefits Filter foams trap dirt and provide a surface for beneficial bacteria. Integrated UVC treatment helps control green water caused by suspended algae. The pressurised outlet can supply a raised watercourse when paired with a suitable pump. Core Features A cleaning handle in the lid helps compress the filter foams for maintenance. Quick-release fastening gives access to the filter for servicing. The filter can be buried up to the lid, while keeping access for maintenance. Filter media and hose connections are supplied. Pump and hose are sold separately. Technical Specifications Model Filter dimensions Ø × H UVC lamp output Blue / black foams Bio-elements Oase part number 4000 225 × 335 mm 7 W 1 / 2 0 47601 6000 350 × 450 mm 9 W 2 / 1 20 47602 10000 350 × 570 mm 11 W 2 / 2 30 47603 Model Maximum pond volume without fish With fish With koi 4000 4,000 litres 2,000 litres 1,000 litres 6000 6,000 litres 3,000 litres 1,500 litres 10000 10,000 litres 5,000 litres 2,500 litres Specification All models Inlet / outlet hose connections 19 / 25 / 32 / 38 mm Maximum operating pressure 0.2 bar UVC cable 3 m Pond capacities are Oase maximum guidance. Select according to fish loading, sunlight and the complete filtration system.Who is this product for?For pond owners who want a compact pressure filter with integrated UVC and already have, or are choosing, a suitable pump. Use the fish or koi capacity guidance for stocked ponds and check the pump against the installation and pressure limit.