I made this in about 15mins. (Not Counting the 2hrs in HomeDepot) :angry:
First you buy 2 female,and 1 male garden hose ends.
The kind you use to replace a worn out end.
I then cut off about 10 inches off a $5.00 hose and added 1 of the female
ends to it, ending up with a very short hose with two female ends.

I had also bought a three-way garden valve ($3.95),
20 feet of non-toxic vinyl hose ($4.97).
Fit right up to Gravel Vac head. To this I put a male end.
hook it all together and there you go.

I am going to add a 1/4 turn valve just below the Gravel Vac head, to make it
truly a one person start.
To Use all you have to do is turn valve to water supply on
and the drain valve off.
Water fills the clear hose to the gravel vac until its almost full.
Shut off supply valve. Kink clear hose right below gravel vac (thus the need
for another valve.)
Stick Vac in tank and fill with water.
Open drain valve, and siphon starts automatically. :D
To fill tank shut off drain valve and open supply valve with Vac head
still attached as it softens the pressure from the supply to almost nothing.
Works great, and best of all...
NO TANK WATER IN THE MOUTH!!!!!! :D
If you have any questions, Just ask.