Brian, The sand bed provides a habitat for small beneficial creature to live. This is from wetwebmedia.com:
Another significant advantage to deep sand beds is the provision of a dense and natural habitat for numerous micro and macro-organisms. Many fishes and invertebrates cannot be kept successfully or at least optimally without a DSB. Some popular wrasses, jawfishes and gobies"¦ horseshoe crabs, sea cucumbers, stingrays and many other featured creatures will not thrive without thick sandy substrates. Countless invertebrates including some corals will only survive on a sandy seafloor (hard substrates like rock are inhospitable to their feeding strategies and polyp cycles). At various and increasing depths, DSBs provide natural foods for these fishes and reef invertebrates like microcrustaceans (amphipods, copepods, mysid shrimp, etc), bacteria and other nanoplankton. DSBs also provide habitat for desirable plants, algae and animals. Seagrasses like Thalassia and Syringodium (Turtle grass and Manatee grass) for keeping seahorses, pipefish or Cassiopeia (Upside down) jellyfish, for example, require very deep beds at 6" minimum.
Full article :
http://www.wetwebmedia.com/deepsandbeds.htm
Also, I plan on having a few jawfish. I already have two engineer gobies (convict blenny, convict goby, or whatever other name you want to call them by, there are more). These fish require a fairly deep sand bed. Deep sand beds are beneficial in my opinion.
As far as asthetics, I don't like the bare bottom look. I like the looks of sand. If you're thinking about the sand up against the front glass and seeing the dirty edges of the sand, I would agree with you, that does not look good. I designed the tank with this in mind. I can have up to 6" of sand in the tank without ever seeing the edges. There is a 6" plywood "lip" at the bottom.
Yes, I do want opinions and thank you for giving me yours. I don't get offended and read everything. I may agree or may not, but I don't mind getting all sides even if I don't agree.
