i think that the sand will filter through to the bottom of the tank.
what i did with mine was to put the gravel at the back
of the tank with the tall plants,and put the sand at the front.
the fish,especially my large plec does stir the sand a little
when he shoots off after feeding,however it does settle pretty quick.
all you need to do is stir it slowly with a stick(bbq squewer) and
hover the gravel vac over the top to clear any poop away.
it is fun to watch the corys on the sand,it filters out through
and yeah to getting the instant e-mail notice.:)