Smaller, more frequent water changes are essential to maintaining the health and vitality of your beautiful, exotic fish. Without routine water changes, invisible toxins such as ammonia can quickly build up in your aquarium and create a hazardous environment for its inhabitants. The Python No Spill Clean and Fill Aquarium Maintenance System is a complete ready-to-use unit which adapts easily to most faucets and makes frustrating, time consuming water changes a breeze! Instead of siphoning water through a tube with your mouth and lugging around heavy buckets and spilling water on the floor, simply attach the Python attachment to your closest faucet and begin cleaning! The water flows directly from tap to tank when filling up your aquarium, and when you are ready to empty, simply turn the nozzle and the water will flow directly from your tank and into the sink without hassle or mess. This convenient system quickly drains and fills aquariums, yet is gentle and mobile enough to not disturb sensitive fish or delicately placed decor while vacuuming gravel or completing other routine maintenance. Forget the struggles and frustrations! No buckets, no siphons, no mess, no tank tear downs...EVER again! The versatile Python unit is suitable for use in both freshwater and saltwater aquariums of any shape or size! The Python No Spill Clean and Fill Aquarium Maintenance System includes: hose, 10" gravel tube, switch, hose connectors, faucet pump, and brass faucet adapter. Fully compatible extended length gravel tubes (20", 24", 30", 36", 48, and 72") are available for applications requiring additional reach. Extended length gravel tubes are sold separately.