fountain running whenever you are home but to be off in your absence (although the birds in your yard may have something to say about that!)
       Frame the reservoir of the fountain out of 2" x 12" pressure-treated lumber.  (To hide the frame, it is best to paint it black).  If you use four or more larger urns or very heavy drilled character stones, it is best to pour a concrete foundation to support the rock.  Yet this is not at all necessary for fountains of average size and design. 
     A typical size is 4' x 4', although 3' x 3' works fine for a single urn or smaller design.  Line the frame with a sheet of 45 mil EPDM pond liner.  After the liner is carefully placed, secure it in place with furring strips screwed into the 2 x 12's.  Some designers also include attaching a 3/4" sheet of plywood to form a bottom to the box.  Usually this box reservoir of a disappearing fountain is set into the ground to hide it. 
     Assemble your pump and plumbing, using ball valves to control the flow to each fountain piece.  If the pottery you have chosen does not have a hole in it, drill one with a masonry bit.  Plumb in a tubing adaptor at this juncture for connection to the pump.  Seal the hole with RayCrete and plumber's putty.  Vertical PVC piping extends to the top of the pot, but don't trim it down until you are satisfied with the flow. 
     Place concrete blocks throughout the reservoir to hold up the structural plastic grid.  Cut a one-foot square window out of the grid, so that if you need to access your pump, you don't have to disassemble the entire fountain.  With the reservoir finished, place a layer of 1/4" black plastic netting over the structural plastic grid to hold the stones.  Vary your stone size and color to match the fountain.  Keep the water feature clean with Fountec.  Then turn on the fountain and relax!