The Oase Profi Clear is a modular filter system for cleaning large bodies of water such as large lakes & ponds. The Profi Clear can be operated in two different ways; through a gravity fed system or a pump fed system. The filter system has 5 different modules; Pump Chamber Coarse Debris Extractor Filter Foam Module Bioballs Filter Module & Phosphate Binder Module. These five different modules that are all available separately allow you to customise the perfect filtration system for your pond. All modules come with a 3 year guarantee (when you fill in the required form) All modules are 800 x 600 x 800 mm (L x W x H) To view details of each one please. To sign up for the official Oase newsletter please