Oase BioStyle Replacement Filter Cartridge

5-in-1 Filtration – The BioStyle Multi-Stage Filter Cartridge provides 5-in-1 filtration which ensures clean, healthy, and clear water for your aquarium. No Mess Maintenance – the disposable filter cartridges are easily removed and replaced.Contains two replacement cartridges – fit inside the chamber of the BioStyle Power Filter series. Quantity needed depends on the size of the filter.Each Multi-Stage Cartridge includes a filter foam, chemical media mix and filter fleece.Stage 1, Filter Foam – 45 ppi filter foam traps debris and waste and offers surface area for beneficial bacteria. Stages 2-4, Chemical media mix – contains carbon, zeolite and phosphate binder, that work together to remove odors, impurities, and harmful nutrients from the water. Stage 5, Filter fleece – traps extremely fine debris for a water polishing effect.Changing the filter cartridge – filter cartridge should be replaced after 4-6 weeks, depending upon aquarium size, number of fish and plants, and declines in fil