Fire glass crystals sit atop the flame, usually in a tray that is designed to hold them. You can find examples of tabletop fire pits that use fire glass by visiting this page. Simply pour your fire glass pebbles evenly into the pit and turn on the gas.Click to see full answer. In this regard, what is fire glass and how does it work?Fire glass is a tempered glass that adds color and reflection to fire pits and fireplaces. It consists of small, stone-like pieces of glass that are rolled and polished so that they aren’t sharp or dangerous. what do you put under fire glass? To fill the gap between the fire ring and the bottom of the fire pit we recommend using sand or Exotic Glass Base Filler to achieve this result. DO NOT use lava rock, lava pebbles, rocks / pebbles or any other porous material UNDER the fire glass. In this way, can you use fire glass in a regular fire pit? No, the glass is only designed to be used in a gas fireplace insert or a gas fire pit. You can not use it in a wood burning fireplace or wood burning fire pit unless it’s been converted to natural gas or propane.How much fire glass is needed for a fire pit?We recommend that you use 1–2 inches of fire glass to cover the burner, but be sure to not overfill your fireplace or fire pit.

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