Des,
For our tanks, I don't use a siphon. I use a rubbermaid food storage container suited to the size of the tank to scoop out the water into the discard pail. Way faster than a siphon, ime.
When we had our 180g years ago, I used to use a small sump pump hooked up to a hose to remove water for water changes. Just gotta be careful to watch the discard pail so it doesn't overflow. That little pump really removed the water fast
