●Easy cleaning, rinse with vinegar and water. ●Fire glass will not discolor, melt, deteriorate or produce toxic fumes. ●Gently tumbled to remove sharp edges. Very safe and easy to install. ●Designed for use in propane and natural gas indoor fire place, fire pits, outdoor fire bowls as well as decorative in garden,back yard,fish tank,swimming pool,flower pot and so on ●It does a wonderful job of covering the entire floor of a fire feature, effectively hiding the unseemly pipes and tubes.