You have to pay attention to both the food you feed and the water your fish touch. Aquarium tank water filter is a necessary device for your aquarium. This item use air pump to create water current, in order to get the effect of filtering and to cultivate nitro bacteria. Multifunctional aquarium filter adapts to your fresh or saltwater system&acute;s filtration needs. It is quick and easy to install and use. This economic and effective item is very practical for household.<!--Features --><p>FEATURES</p><UL class=p_f><LI>New and high quality</LI><LI>Provides biological filtration to the aquarium, helps to stable water quality</LI><LI>Increase the oxygen solubility</LI><LI>Working noiselessly</LI><LI>Adhere smooth surface with suction cup</LI><LI>Water inlet hole diameter: approx 18mm</LI></UL><!--Specifications --><p>Specifications</p><UL><LI>Fit for: 30cm / 11.81" Aquarium</LI><LI>Dimensions: (5.71 x 5.5 x 1.77)" / (14.5 x 14 x 4.5)cm (L x W x H)</LI><LI>Weight: 2.89oz / 82g</LI><LI>Color: Black</LI><LI>Water Inlet Hole Diameter: Approx. 18mm</LI><LI>Model: XY-2831</LI></UL><!--Package Includes --><p>Package Includes</p><UL><LI>1 x Biochemical filter</LI><LI>2 x Sponge</LI><LI>1 x Suction cup</LI></UL><!--Extra Info --><!--produts_compatibility -->