Evening All.
My first proper post in a while eh? see if ive stopped being a snotty teen.

Simple enough answer.
Get a tube and a bucket.
Put the bucket on the floor
Put the tube just under the water level.
Suck on the "dry" end of the tube until water gets past half way.
Gravity will do the rest.
Fatter the tube, faster the water flow.
How i clean my tank. Does your cleaning, changes your water, keeps your fish happy and, it doesn't cost an arm and a leg either!
Basically, if you need to vac more then once or twice a week, its time to add another filter to the tank. (assume that your not over feeding etc)
Clean your hang on filters once a month, canister filters whenever the flow rate slows and clean your in tank filters once a week regardless.
Always use tank water, and refill the water in the tank with cold water, ideally thats ben stood for a while.
Changing out water is never a bad thing in my opinion.
Best of luck
Craig