Well anyone with a deep tank knows that most of the off gravel cleaners that you by off the shelf won't reach the back of the tank. I came up with a cheap way to build one using stuff bought at Lowe's. The only down side is the tube is very thin and will fold in half if you don't support it. If enough member want to build some of these I will look into buying some acrylic tube with .125" wall.
So here is the list you will need.
Standard T12 fluorescent tube holder
1.25" coupler
1.25" slip x .5" FPT bushing
.5" barbed fitting.
Tube to fit the barbed fitting.
Super glue gel
PVC glue
to start figure out how long you need it. I stuck mine in the tank and drew a line at the top of the tank
then cut it with either a sharp knife or scissors. Once you have cut it apply superglue gel at the end of the tube.
slide the coupler on the end of the tube and give it a minute or so to harden
then glue and screw the fittings together.
then attach the tube and its ready to use
Like I said, it is VERY thin tube so it will fold in half. But I spent $8 on all the stuff except the PVC glue I already had it.