AquaClear Nano Aquarium Preset 6-Inch 25W Heater and Water Change Package for Aquariums Less than 10 Gallons 25 watt heater Lifetime guaranteed heater 4 ounce AquaPlus included 4 ounce Cycle Included Aqua Clear Nano 6-inch preset 25-watt heater and water change kit with water supplements Includes Nutrafin Cycle Biological Aquarium Supplement and Nutrafin Aqua Plus Tap Water Conditioner Water supplements and conditioner establish a safe biological aquarium environment for fish New high concentration formula reduces fish loss and establishes essential conditions in new aquarium set-ups Kit for use in freshwater or saltwater aquariums less than 10 gallons