Whats the simplest way to keep a sandbed white!?

[Snappy]

The first thing I would do is change the avitar. Man that M M is creepy. After that I would add in a few fighting conches and a pair of watchman or orange spot gobies to help sift the top layer of sand. There are other good sandsifters but some fish (eg: dragon goby) make a real mess and spread sand all over, while watchman tend to stay low in the tank. IME What size of tank is it?