I used to have a plain siphon but spent more time sucking out the contents as I didn't get the flow right in the beginning. With this one you just stick the end in the tank, squeeze the blue bulb a few times and away you go. It's so easy to use. It should come with two end attachments. Use the one that has small holes in the bottom of it or the other that has no cover over the bottom will end up sucking up loads of the sand. All I do is very gently move it in small circular movements just above the sand, although most of the time a few little backwards and forwards movements is enough for the muck to lift up with very little sand coming up along with it.