Changing the Water in a Waterbed, Should I? No
Will a waterbed start to stink? It can if not maintained properly.
Is draining a water bed necessary? Only if you need to move the bed somewhere else.
Are all pretty common questions we get asked when it comes to waterbeds this blog http://www.stlbeds.com/articles/2009/01/… gets into more detail on the subject and offers some helpers.