Key Features Robust and reliable Air Pump Suitable for ponds and Aquariums Low noise thanks to diaphragm design For ponds up to 7000 Litres Comes with 8mm airline, large airstones, air divider and hose splitter The Velda Silenta Pro is a reliable Air Pump that provides all the essential oxygen needed to your pond life Pond and Aquarium fish need a clean environment to live in, this includes water enriched with oxygen. Including an Air Pump helps to deliver the essential oxygen in a simple way Velda Silenta Pro is a robust air pump with a metal casing, providing a long lasting pump. The pumps are quiet running system thanks to the diaphragms inside and have a low power consumption Each pump comes with a 8mm diameter airline and large airstones that drive the air from the pump and out as beneficial bubbles. They also come included with a hose splitter connector as well as a 4/6mm outlet air divider. Specifications Model - Silenta Pro 1800 Output - 1800 LPH Power- 25 Watt For Ponds -Up