Is my water pressure not good enough?

[NJ Devils Fan]

I have a python that I use to clean the tank, but when the water reaches the highest point in the tube(by my hand) it stops and nothing happens. I usually put both, the hot and cold all the way up for what seems to be the greatest pressure.

[slipknottin]

what floor are you on?

[125gJoe]

I've found the Python has the most pressure when hooking it up to the garden hose. I'm not sure if you have that option, but it works..

[DodgeIntrepidV6]

I tryed my 55 downstairs and the python only 1 floor up would not suck the water up!!! Does anyoen else have this problem, Now I hook it up to the sink 1 floor below me, adn it works fine. It should still get the job done, I have a lot of room in my basement and I am dissapointed I can't keep any large tank downstairs because the stupid python doesn't work