I have a tank thats about 4inches off the floor and I just use a siphon and got a long enough hose to go outside to my irises and lilies. They've gotten HUGE! The leaves on the lilies are almost 6ft... Its f-in crazy.
Wow i just tried to siphon into a bucket on the floor even though it is level with the tank and it worked! Looks like I won't be needing any pumps or to suck it into my mouth! lol