This is what I understood - When I ordered my fire/water bowls, it came with the bowls/fire rings and lava rock (2 bags) but they said that to add the lava rock first to 3/4 high, lay the fire ring on top and then place a thin layer of lava rock again not to place too much over the ring. Gently sprinkle your colored fire glass on top of the ratty lava rock for beauty and move around to your liking. They also make a cutout shape (like a cookie cutter) that you can place on top to separate colored fire glass which looks neat. Make sure the PB buys the full port valve and not the reduced port as you want as much fire/gas flowing when the fire pit is going (he should know this). I have a fairly larger order of glass to buy so I will shop around....