What I'm talking about is that python tubing is just vinyl tubing that costs twice as much. Pythons are over rated IMO, and waste a lot of water. You can accomplish the same with a gravel washer (not gravel vac), siphon J-tube, and RV hose. This method is cheaper, and much more effective.
If you are insistent on using a python, you can just buy the python essential parts, and use an RV hose for much cheaper. I have a full python unit, that is 100' long, and it ran me a total of $35.