The construction of a deep sand bed (DSB) is very simple and straightforward with only a few requirements.
Many marine aquarists undertake this job as they wish to maintain high water quality and at the same time have additional interest in the aquarium, which takes the form of the tiny, and sometimes not so tiny, life forms which hopefully will make the DSB their home.
Dr Ron Shimek is a very well known aquarist who undertakes research. Following is a link which provides all the information needed – sand type, depth etc – in the making of a DSB. In addition, some of the life forms that may inhabit the sand are given. It is very well worth a visit if a DSB is being considered.