BioTec ScreenMatic Set 40000 OC by Oase (UK) LtdKey Features First class and powerful individual products, perfectly matched Coarse debris extractor protects the filter sponges and extends the service life of the filter Settlement surface for micro organisms for decomposition of pollutants and nutrients Clear and healthy pond water with minimum maintenance requirements Particularly long service life thanks to automatic coarse debris extraction before it enters into the filter Continuous belt filter