Effectively clean your pond with an OASE Biopress filter, accommodating ponds with elevated water courses. OASE Biopress pond filters have OASE Biopress 4,000, 6,000, and 10,000-litre capacities, making them suitable for varying pond sizes. Quick-release clips are built into OASE Biopress pond filters, enabling easy access to the filter for thorough cleaning. If you need a pond filter for a large pond that exceeds a 10,000-litre capacity, OASE Biosmart pond filters are ideal.