Features:This mini-filter cartridge is very suitable for small aquarium use， do not take place， the effect is obvious.Easily split and easy to clean.No separate power， with a single-hole pump can be driven;Triple filtration system - cotton filters， quartz sand， activated carbon.Received a pump vents， directly into the aquarium use.Activated carbonSuitable for 10-60cm sink， large fish tank filter is only suitable for secondary use direct oxygenationTriple valid serial filter:Sand particles can block a lot of waterSponge can absorb residual substancesCharcoal make water more clearBubble stone ejection in the fresh air will lead to clean water， give your fish to create a healthy environment for the growth.Specifications:Color: blueMaterial: plasticSize: 8 x 8 x 5.5cmNet weight: 147gPackage Content:1 x Fish tank Water filter