Awhile back I was asked to post pics of our home-made sipon. That was about 4 months ago - I'm slow sometimes!!
Things you will need for this project:
2 garden hoses (never been used)
This is very important!! You don't want any chemicals or dirt/bugs in used hoses to get into your tanks.
An extra long sipon that you purchase at the LFS
Some plastic tubing wide enough to fit over your faucet
Two adjustable clamps.
First the one to empty and siphon the tank:
Slice one metal end off of one of the garden hoses.
Insert the thin end of the store bought siphon hose into the garden hose and use a clamp to attach it.
Leaving the big end of the siphon hose attached to the thin hose.
My tank is close to my front door, so I run the uncut end of the hose out into the garden. I take the siphon end and do my business inside the tank. Use gravity to get the flow going - it is really easy. The water and waste go right into the garden - no cleanup and it fertilizes my garden too !
Now the one to fill the tank:
Cut off BOTH metal ends of the hose and slid the plastic tubing over one end. The plastic tubing may need to fit on the outside of the hose depending on the width needed to cover the faucet. Again, use a clamp to attach it.
Then the other end of the plastic tubing is slid over the faucet. Mine had to be split a little because I measured wrong.

The other end of the hose (without the plastic tubing) is put directly into the fish tank. Remember I cut off the metal end piece already - this way I don't have to worry about it banging against the tank.
Becareful when turning on the water. There should be someone at each end of the hose, at least the first time you do it. At the faucet, you need to watch the pressure to make sure it doesn't blow the plastic tubing off. At the tank, you need to make sure the hose doesn't pop out of the tank. Both of the warnings come from experience...

Meaning, I have been there, done that, cleaned up the water spills!
Using these 2 hoses, I can change the water in my 120 gallon tank, with rock cleaning, from beginning to end in less than 30 minutes. And that includes clean up of hoses etc. Hope this helps someone - good bye buckets!
Brooksie