Product: Hydor Skimmer Performer 150/800Features:Elegant and easy to use , the new range Performer is made of 100% acrylic to ensure perfect bonding , the result of machining with CNC machines. O-ring seal on each : neck , exhaust, etc joints . Hand-assembled and tested at 100%. Complete package: pump / and skimming , silicone tubing for air, special control system with exhaust silencing system of aspiration . The pumps are equipped with a skimming system lubrication and cooling and rotor brush Rotormix . low fuel consumption and low noise circulation of water skimming and super efficient o- ring seal on the neck and regulation of discharges in height high possibility to adapt to the various type of possible application low power consumption (the pump supplied has a wattage of 26W )Specifications:Hydor skimmers are equipped with an exhaust system to adjust the level within the column without changing the amount of water treated .They also offer an air regulation system that allows you to control the amount added enabling users to adjust the skimmer according to your personal needs.Positioning :L entire range PERFORMER has been designed so that it can be placed both inside and outside ofa tank sump. Installations ideals are :• Pumping from the aquarium with the same return ;• Pumping from the sump and return in the same (recommended) ;WARNING : Never install a system that pumps water from the aquarium through the skimmer and returns in a sump placed at a lower level. In fact, if the pump that returns water from the sump to the aquarium grinds to a halt , the sump could become flooded and the aquarium as a result of communicating vessels will empty the tank to bring to the level of the pump.Some experts advise one foam " wet type " beer ", etc. . These results can be obtained by acting on different (practically infinite ) possibility that these skimmers allow calibration . You get very different results " playing" with adjustments of the air , the amount of water treated and the level in the contact column .Pump specifications skimming ( Hydor Seltz L45 ) : voltage 230V - 50Hz consumption 26W capacity 3100 L / h prevalence 190cm needle wheelThe pump charge pump is not included and must be purchased separately and the diameter of the fitting to connect the charging pump is 12/16mm .warnings :• The outlet of the skimmer should not be immersed (ideal place to " water level ");• The best performance is achieved if the skimmer pump that powers it is located in a compartment withthe water at a constant height ;• The skimmer needs at least 3-7 working days before you start to foam soeffective . Only then should you proceed with the calibration according to your needs .• Some rubber tubes , even if not used to feed the skimmer but other instruments , may releaseSubstances that inhibit skimming . Therefore it is recommended to only use hose sold specificallyfor the aquarium trade or for food use.