Burning Fire Pit with drinks

Why is My Fire Glass Becoming Discolored?

Fire glass offers so many benefits for those who have a gas-powered fire pit at home. Those shiny glass fragments are easy to install and they create a unique aesthetic that transforms a rustic fire pit into a magical performance guests love.

Fire glass is also low maintenance…unless of course, they start turning black.

Yes, discolored fire glass is one of the rare issues some people run into, but the good news is- it’s an easy fix.

We share how to handle it in our post!

Why Does Fire Glass Turn Black?

Landscape Glass

Landscape Glass

If your brightly colored fire glass is starting to look burnt, the culprit for this is soot, and not the fire glass material itself.

Fire glass is specially tempered and non-combustible, which means that no chemicals have been added that result in the residue left on the surface from burning.

The problem lies with the gas-powered fire pit, mainly that it isn’t burning properly. This is commonly seen with liquid propane setups.

The result is a fine layer of black soot being left behind on the fire glass. This is how to nip it in the bud for good.

Fixing Your Fire Pit

Liquid propane is denser than clean-burning natural gas, therefore enough air must reach the gas to burn completely. If LP doesn’t have enough air, it won’t burn clean, resulting in soot. 

One solution is to consider an LP gas air mixer. Once installed, it should do the trick and produce the cleanest burn possible, whilst getting rid of the soot. 

If your fire pit already has an air mixer, but soot is still occurring, then check how it’s installed. Sometimes it can be installed incorrectly or the air mixer is undersized for the burner.

How to Clean Fire Glass

After fixing your fire pit, the next order of business is cleaning the stained glass. Fortunately, this is also an easy endeavor.

All you need are the following supplies:

  • Bucket
  • Strainer
  • Water
  • Vinegar

Simply rinse the glass through with the water and vinegar, and in a few minutes, every glass shard should be shining as bright as jewels again!


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