Python No Spill Clean and Fill Aquarium Maintenance System is a complete, ready-to-use system that adapts easily to most faucets and makes changing your aquarium water a breeze. It drains as well as fills aquariums, and will not disturb fish or plants during routine aquarium maintenance. This system eliminates the need for buckets, siphons and tank tear-downs that lead to bigger messes. Included with the Python No Spill Clean and Fill Aquarium Maintenance System, youll receive a hose, gravel tube, switch, hose connectors, faucet pump and brass faucet adaptereverything you need for easy aquarium maintenance.