100009478 Size: 10 to 20 Gallon Features: -Filter. -Available in 10 to 20 Gallon, 20 to 30 Gallon, 30 to 45 Gallon, 50 Watt sizes. -Aqueon s patented design includes unique features to enhance water quality and clarity. -Also increases oxygen levels and reduces noise. -Four-stage filtration-mechanical, chemical, biological and wet. -Dry, for cleanest, clearest oxygen-enriched water. -Made in United States.