Fire glass is very easy to maintain because it emits no ash, soot, or smoke. Thus you can spend more time enjoying your fire pit/place and less time cleaning it | Our fire glass is not just exquisite to behold, it is also very practical. It does a wonderful job of covering the entire floor of a fire feature, effectively hiding the unseemly pipes and tubes | Heat Rating: Higher temperature when compared to logs, lava rocks, stones, etc. | Ideal for both indoor or outdoor environments, fire glass may be used in either natural gas or propane fires | Available in 10 and 20 pounds