Hey, i too am thinking about changing to sand from gravel.
I am a little confused about cleaning though - do i use the same syphon i used for gravel? I gather i move the syphon along the top (but not touching the sand) to suck up the top layer of sand? Does this just clean it and drop it, or will it remove the sand from the tank?
I then gather every now and again i need to disturb the sand to clean it deeper down. Will this not mean that i suck up an awful lot of sand every time i clean?
I am intrigued by the black sand. Has anybody got photos of a tank with black sand so i can see how much better it looks?