Drum filters (shown right) are a relatively recent addition to the pond market, developed from aquaculture and industry. They filter out fine particles through an automatically cleaned mesh, before the water passes through biological filter media - in this case a heavily aerated moving bed of semi-buoyant plastic media. They are popular on koi ponds.
For very large watergarden ponds different approaches are used to deal with the fine suspended sediments, floating debris and high nutrient levels - Usually a combination of techniques including plant filter beds, (a form of natural filtration).
Filtration solutions are as diverse as the ponds that we deal with. We will always investigate each site individually before recommending the most appropriate options. We are not tied to any one brand, and choose from the best available.