Feature:<br /><br />\u25cfBiochemical cotton filter use air pump as power source，working noiselessly.<br />\u25cfIn order to achieve clean and  stable water quality，the item adopt the multi-level filter of high density cultivating digestive flora.<br />\u25cfAquarium filter sponge for efficient biological filtration<br />\u25cfSponge filters provide both mechanical and biological filtration<br />\u25cfSimply install an air line into the unit and provide both aeration and filtration for your fish<br />\u25cfThe air tube can be stretched and contracted freely， when stretched， it can improve the water flowing<br />\u25cfDuck shap air output shap can make the water in the tank have a good circulation.<br />\u25cfSupplying the water with much needed oxygen.<br />\u25cfReduces noise from air pump and consumes lowest wattage.<br />\u25cfThe sponge material is easy to clean<br />\u25cfQuiet operation<br />\u25cfThe air diffusion chamber produces minute and large number of air bubbles which increase the oxygen solubility in the water<br />\u25cfThey are useful for as breeding filter or as secondary filter<br />\u25cfIn addition， the sponge traps larger waste particles mechanically cleaning the water without trapping baby<br /> <br />To use:<br /><br />\u25cfBefore use， soak the Bio-foam in aquarium water for 5 mins.<br />\u25cfDuring maintenance， always rinse the Bio-\u25cfFoam with drained out aquarium water only. No tap water or hot water should be used at all.<br />\u25cfWhen reusing the Biofoam ，do squeeze the foam in water to remove all trapped air bubbles. This will keep the filter stay <br />   submerged.<br /><br />Package Included:<br /><br />1x Aquarium Sponge Filter(XY-2890)<br /><br />Note:<br /><br />1.Due to the light and screen difference， the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.<br />2.Please allow 1-5mm differences due to manual measurement.