What kind of filter do you have? Depending on what it is, you might be better off without it. But you would need to get a powerhead if you don't have one, and more live rock.
I'm just running 25 lbs. of live rock and 20 lbs. of live sand, with two Hydor Koralia power heads to circulate the water(850 and 425). Two peppermint shrimp, five trochus snails, a ton of hitchhiker organisms, and two Ocellaris Clowns. I didn't add the clowns until almost two weeks after I had the snails and shrimp, and everything has been stable. All the residents of my tank are looking great too. I'd probably up my live rock to 30-35 lbs, or get a protein skimmer if I add any more life to the tank. Depends what pieces of rock I can find and how I can add them to my aquascaping. I've been doing 2-3G water changes weekly, and that always brings my nitrates from 5 down to zero. I periodically do very small water changes too, where I scoop water off the very top of the tank to keep surface scum down(maybe a few cups at a time) Topping off daily with distilled water for evaporation. I think things are working out pretty well.