For koi enthusiasts and professionals, only the highest-quality equipment will do. OASE's advanced filtration systems, energy-efficient pumps, and precision-engineered aeration technology provide the perfect balance of performance, reliability, and water clarity - ensuring koi thrive in an environment as pure as nature intended.

Pumped Drum Filter System or Gravity Drum Filter System?

Will the filter be located above or at the height of the water level? The answer to this is important, because the maximum flow rates of a filter also depend on its installation type and location. Filters that are operated with a pump are often above the water level. Filters that use gravity are placed at the height of the water level.

Pumped Drum Filter System

A pumped filter system uses a pump installed in the pond to actively pump the contaminated water into the drum filter system, where coarse and fine dirt particles are mechanically removed through the drum's sieve. The cleaned water then runs through biological filter stages and finally flows back into the pond.

Gravity Drum Filter System

A gravity filter system allows water to flow from the pond into the drum filter unit via bottom drains or skimmers, using natural water pressure (gravity), where it is first mechanically cleaned of debris. The pre-filtered water then passes through additional biological filtration stages, such as moving bed modules, before being pumped back into the pond.