K,
Ive got a 10 gal myself. Im also looking into getting some sand stirrers, you can get some brittle stars they are good for that. Also sand crabs, get a few and they will churn it up.
Ive got a bicolor pseudochromis in there too but to be honest im thinking about trading him in b/c he kills all shrimp and crabs I put in, just harrasses them to death.
What kind of soft corals do you have? I want to put some in and need ideas.
Liq.Sky: you want to stir the sand to promote breakdown of waste materials in the sand, with the stirrers its a slow process so theres no trouble of shocking your system w too much ammonia.
Let me know about your soft corals ok, hope that helped.
R.