4000M Lake Diffuser SystemThe 4000M Lake Diffuser System is a sub surface aeration solution designed for large ponds and lakes up to 4000m (approx. 1 acre) and a maximum depth of 3 meters. It delivers high levels of oxygenation and water circulation through the land based AP30000 air pump. Air is channeled via a valved brass manifold into 30m lengths of weighted airline, which feed 6 self sinking double diffuser assemblies. Key Features: No electrical components in the water