The Dupla Marin Ocean Sump OS 500 filter system is a comprehensive filtration solution for aquariums with a capacity of up to 500 liters. This sump filter features five chambers and measures 76.6 x 40 x 40 cm, providing efficient water filtration for both freshwater and saltwater aquariums. The system includes two separately fillable filter holders within its five chambers, creating optimal conditions for crystal-clear water and a healthy aquarium environment. An integrated water level controller allows for precise adjustment of the skimmer to your protein skimmer, enhancing overall filtration performance. Installation is straightforward thanks to the five-chamber design, which reduces maintenance time and ensures reliable operation. The filter system comes with practical accessories such as electrode holders, connection lines for dosing pumps, and a convenient refill container for smooth filtration processes. Designed in black, this unit offers durable performance with a focus on practical functionality. As a successor model developed with extensive industry experience, it represents a reliable filtration solution that emphasizes water quality management and system stability for aquarium enthusiasts seeking efficient filtration technology.