Kits include all of the major components for a quality aquarium system. Components are carefully matched to ensure compatibility and relative ease of setup. Available for 10-gallon and 20-gallon (High) aquariums. Basic Kits include: 10-Gallon Basic Kit Undergravel Filter Twin-Outlet Air Pump 50-Watt Heater, 8" 3-Gang Valve 4" Air Bar 4" x 3" Net 8 ft Tubing Thermometer 20-Gallon (H) Basic Kit Undergravel Filter Twin-Outlet Air Pump 100-Watt Heater, 10" 4-Gang Valve 6" Air Bar 6" x 5" Net 8 ft Tubing ThermometerBoth kits also include a detailedBeginner's Handbook. For maximum convenience, Complete Kits-including All-Glass aquarium and full, fluorescent hood-are also available.