The Dupla Marin Silent Power Pump 12,000 is a versatile circulation pump designed for both saltwater and freshwater aquarium applications. This brushless pump features 6-pole synchronous motor technology that operates with minimal noise while offering adjustable power settings to match specific aquarium requirements. With a maximum flow rate of 12,000 liters per hour and power consumption ranging from 35 to 88 watts, this pump provides efficient water circulation with a maximum head height of 5.6 meters. The unit includes programmable wave simulation functionality when used as a circulation pump, allowing for natural water movement patterns. All Silent Power pumps incorporate automatic shut-off protection against dry running or blockage by foreign objects. The durable ceramic shaft construction enhances pump longevity and prevents corrosion in saltwater environments. This model measures 26.5 cm in width, 15 cm in height, and 16.5 cm in depth. The pump operates on 24V DC power and includes hose connectors for 12/16 mm, 16/22 mm, and 19/27 mm tubing. Important installation note: This pump is designed for submerged operation only, either within a filter compartment or directly in the aquarium as a circulation pump. It cannot be used in dry installations or external placements. The electronic control system offers 20 adjustable power settings plus programmable wave simulation. The pump also features a 10-minute feed pause function for temporary suspension of operation during feeding periods. This model represents the highest capacity option in the Silent Power series, which includes five different sizes with flow rates ranging from 1,200 to 12,000 liters per hour.