feed less, thin your stock, get some geos, put a powerhead just above the sand to keep it from settling... lots of things you can do.
What's a Geo ?.Is it a gymnogeophaus ?.I had two but one died.
my Geos (tapajos redheads & heckelii) only pick crap up & spit it out. and crap like everything else.
:-/ no effect on cleanliness, unless some crumbling of the crap matters.