I have used old hoses for water changes but I seem to recall reading something about garden hoses being unsafe for aquarium use due the chemicals they are made with possibly leaching into the water.Python is a waste of money and water. A garden hose can do the same, better, and cheaper. To start the siphon, fill the hose from the faucet and submerge the other end in the tank water. Hooking up a quick disconnect at the faucet end and a wide mouth tube at the suction end will help.