No need for shrimps or other gimmicks, whats to clean? I'm assuming this is a new setup? you need to get the Ammonia, Nitrites and Nitrates cycle going first.
Get the water right and the fish will look after themselves.
1st rule of fish keeping, learn how to look after water, then slowly add some fish, the filters need to build and mature, http://www.liveaquaria.com/PIC/article.cfm?aid=62