Feb 19, 2021 A rototiller, for instance, will help you to break up your soil and expose any large rocks that are embedded in the soil. This will also help expose some smaller rocks that are buried beneath the surface. You can rent one for somewhere between $25 to $50 a day, depending on the size of the rototiller that you go with. Jul 01, 2013 To the average pond lover, rocks are the most straightforward part of any water feature. But not all rocks are the same, and choosing the right one can make or break the look of your pond. Rick Bartel explains how to pick the right rocks for your project and how to place them for optimal results.