OASE Gravity-fed filters install below the pond level, they take in the dirty water and then deliver clean water to a pump chamber that transfers it back to the pond. The OASE ProfiClear Premium is a fully automatic gravity-fed, flow through self-cleaning drum filter that polishes water. Aligned plumbing connections simplify adding Individual. The Modules and the Moving Bed Modules increase capacity of the filtration system. For recreational ponds, gravity fed filters should be combined with 12 volt pumps and Individual Modules Moving Bed System with Hel-X Bio-media to provide optimal biological filtration of up to 14 oz. of food waste per day. The micro control system offers a choice of manual cleaning, time interval cleaning or full automatic cleaning via sensor. There are connections for the AquaOxy 450 to enhance and aeration. You can fully control your ProfiClear Compact with the Easy Garden Control (EGC) system from anywhere in the world! There are dual outlets that align with the Moving Bed and the Individual Modules. The three inlets allow for multiple intake locations throughout pond. A microcontroller with a digital thermometer automates cleaning functions and can be connected to an EGC system. The ProfilClear is made from German engineered GFK Duroplast for enhanced structural integrity. There’s a drain with integrated slide valve that clears sludge as needed and has a drum filter with a removable 60 micron screen. The spray bar removes fine particles from the micro sieve. The Hel-X floating bed Bio-media may be supplemented with 20 additional liters of Hel-X Bio-media to process up to 19 oz. of waste. It also has a dirty water discharge 4" outlet. The ProfiClear Premium Compact-L Gravity Fed has a minimum flow of 2,640 GPH and a maximum flow of 6,600 GPH. It’s course debris extraction is 60 microns and has a cleaning pump of 87 psi. The cord length is 16’ + 16’ with dimensions of 53”L x 35.5”W x 32.5”H and has a pond volume of up to 37,000 gallons. The ProfiClear requires an Individual Module and includes 60 liters of Hel-X Bio-media. It has a 3-year warranty.