Yescom Aquarium Internal Filter 3in1 80GPH 300L/H for 20 Gallon Fish Tank Water Pump Dual effect filtration to make aquarium more clean: Activated charcoal, Replaceable black bio-sponge 2 ways to increase oxygen level: Adjustable spray bar, Transparent aeration tubes CE Certification and Safe and easy to use Mini, light and practical, and low heat and low power consumption Filter Size:1-3/4"L X1-1/4"W X5-3/8"H