| 摘要 |
<p>Pond filters including mechanical filtration and biological filtration in separate compartments 11, 12, 13 within a common housing 1. Inlet water is fed into a first compartment 11 housing moveable media 41 and energy from the inlet flow causes the moveable media 41 to move. Mechanical filtration is provided in a second compartment 12 and a static biological filter is provided in a third compartment.</p> |
