Features:<br>Biochemical Bag filter provides biological filtration to the aquarium, helps to stable water quality.<br>Increase the oxygen solubility.<br>Working noiselessly, very durable, can be used for years.<br>Good permeability, easy to clean.<br>Perfect filters accessories for your tank and aquarium.<br>Speicificaitons:<br>Product name: Aquarium Bag Filter<br>Material: fabric<br>Color: White<br>Size:12*15cm,12*25cm,18*30cm,18*35cm,20*35cm,20*45cm,30*50cm<br>Reminder:<br>1. Soak the blanket or bag in the boiling water for 5 minutes before use, by doing this will help nitrifying bateria colonise easier.<br>2. Use tap water to rinse clean the blanket with fluff down; clean the bag by fixing it on the water tap.<br>3. Place the blanket in the wet and dry separation box with fluff up.<br>Notes:<br>Please allow 1-3mm differs due to manual measurement.<br>Due to the different display and different light, the picture maybe a little different with the actual color of the item. Thanks for your understanding.<br>Including:<br>1pc Bag Filter