You are correct that it is not very beneficial to regularly vacuum your sandbed as there is plentiful and necessary life that needs to remain in the sand. However, I have vacuumed mine lightly from time to time when debris lays there from moving rocks around and what not. I just skim the surface though, and I try to barely get any sand if possible. A good cleanup crew should keep the bed presentable most of the time. I would never strongly vacuum my sandbed or go above the surface.