Flow-through filters are placed at the highest point outside the water body, so that the cleaned water can flow back by gravity. Even the FiltoMatic for smaller ponds works with automatic self-cleaning. The BioTec filters are suitable for ponds with a capacity of up to 140 m³ and are particularly effective in combination with OASE AquaMax Eco filter pumps. Our modular flow-through filters are suitable for demanding bodies of water with a capacity of up to 260 m³ and also for koi ponds. They can be individually expanded and can be controlled via the OASE Control app.