08-24-2013, 10:03 PM
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I've never used the Python or Aqueon....
I made my own based on the following (works great): DIY Water Changer
The only issue I really had is when I vacuumed it drew a lot of water... I'll do my best to describe: when you use the device to remove water from your tank you have to turn the faucet on which basically is just running the water wide open in the sink, but this is what creates the draw.. My experience is that it uses up a lot of water in the process. If you have a few smaller tanks its probably no big deal, but if you have a large tank or multiple tanks it does seem a bit wasteful. This would be the case with any of the mentioned changer's including the DIY model.
Whichever device you decide, it will be a good choice as I think they are fairly similar, but definetly get one!