Evolution Aqua - EazyPod Air Pond Filter -Koi - FREE SHIPPINGA compact member of the Nexus family, the EazyPod is a mechanical and semi biological filter system for ponds up to 10,000 litres. The EazyPod utilises static K1 Micro, which provides enhanced biological benefits, even when using the EazyPod solely as a mechanical waste filter. Water from the pond enters the EazyPod via the inlet and then flows around the circumference of the outer chamber of the EazyPod, passing through the stainless steel grill