I siphon my water out the tank straight into my sink. From there I use my highly engineered faucet adapter (see my post in the
DIY section) to connect the siphon hose at the faucet and start willing the tank back up. Put my water treatment into the tank as it's filling. Doesn't take all that long, but I'm sure it would take a little while if I was doing this to a 150G tank or something similar. Siphoning out takes a little while, but that's because I don't have much elevation drop from tank to sink. The farther the drop, the more suction it will pull.
If anyone is wanting a python, just go to lowes or home depot or
DFS and buy the clear hose. That's all it is, other than their fancy connectors.