So, walk me through changing water in a tank as big as a 55! What's your routine look like? Currently I have a 20g, and I have a simple gravel vac with a hand pump, and two 5 gallon buckets, which works well for the 20, but I'm not looking forward to all the extra water I'll have to carry! Sort of looking at the Python, but I don't love the idea of running the water while removing water. And I don't have threaded faucets, can it be used without them? Also, do you just dose Prime into the whole tank as you're filling it up? Any other good ways to do WC besides the Python?