OK. So it must be a straight hose, not a gravel cleaner type.

Thanks


"chet" chet-at-surewestDOTnet wrote in message
...
"Frank Mamone" wrote in message
. ..
What type of hose would produce enough suction to suck out the gravel?
Surely not gravel cleaner?

Thanks,

Frank

Depends on how high off the floor you have your aquarium. I would guess
that
a hose of approximately 1" in diameter, with a 5 gallon bucket resting on
the floor would provide plenty of siphon power to vacuum out a
considerable
amount of gravel.

A 1" inside diameter siphon hose about 4.5 vertical feet in length would
have a water column weight close to 1/2 pound. This translates into about
1/2 pound of lift at the bottom of your tank. It would be the gravellest
sucking siphon you've ever seen.

Smaller or larger hose diameters would have a proportional ability to pull
(less weight, but smaller area). It is not the diameter, but the vertical
drop from the tank that makes the difference. I would guess that a smaller
diameter hose might be easier to control than a larger one.

chet