Well, nasarius snails and others that burrow in the sand will help you turn your sand over... Bristle worms will do the same, though some people don't like the looks of them, especially when they get big... But bristles and spaghetti worms do wonders for detritus problems... Really depends on what you're wanting for the look of your tank... Oh those bumble bee snails are suposed to eat detritus too...