Pack of two mixed replacement cartridges for the Aquarium Systems Cobra Internal Filter Range. Newaqua Diamante Plus is a mix of filtration elements especially designed to eliminate substances such as phosphates, ammonium, nitrates and copper, as well as odours, colouring agents, chlorine and ozone. It leaves the water crystal clear when it is brownish (phenol accumulation) or cloudy (excess particles in suspension). Newaqua Diamante Plus exerts an action preventive algae proliferation. It is therefore particularly recommended for always having optimal water quality in new aquariums.