250M Lake Diffuser SystemThe 250M Lake Diffuser System is a highly efficient sub surface aeration kit designed for large ponds and lakes up to 250m and depths of up to 3 meters. This system delivers excellent oxygenation and water circulation by channeling air from a shore mounted AP9000 air pump through a valved brass manifold and into weighted airline sections, which disperse the air via two 60cm Diffused Aeration Rings. Key Features: No electrical components in the water