I'm sorry to report that my short experiment with sand (kiddies play sand) was unsuccessful.

Original article

The problems were as follows:-

1   The difficulty of cleaning the sand.
2   The fineness of the sand getting blown about everywhere and deposited on everything by the filter.
3   The fish, in my case Kribs, an Acara and a Zebra Obliquidens, all swam around with little banners saying "LET ME OUT!!"

I have now cleaned out the tank (or rather my wife and Nigel cleaned out the tank under my supervision ) which smelt pretty rancid, and replaced it with some rather expensive, but not so fine coral sand.

Will report back later on this one once I decide what to put in here. Perhaps a couple of Frontosas............