To help you decide whether or not to re-use your sandbed, here's an article on
Hydrogen Sulfide and the Reef Aquarium (taken from the Reef Chemistry "sticky" thread in the Reef Forum):
http://reefkeeping.com/issues/2005-12/rhf/index.php
You may also consider using no sandbed at all, depending on the fish you already have or want to keep in the future. All three of my reefs have been BB (bare bottom aka without a sandbed) since summer 2005. I wouldn't go back to using sandbeds if you paid me truckloads of money, though I would take the money and probably buy more salt, test kits and additives
