| I haven't used superfine sand yet, but am aiming to do so in my new set up. I've heard that it takes a bit of time to settle down and get the dust out of the system, but it should be fine after some time.
I think the grain size is also much better for most of the sand bed life. Gobies, for instance, prefer the smaller grain size, as it's much easier for them to sift it through their gills. Most of the sea cucumbers, star fish, brittle stars, and the like are also very happy in a superfine sand bed. I think you'll find that it's actually much better at containing/maintaining life than ...say...a coral sand bed.
__________________ Christi  | 
