These rocks are specifically designed for use with gas grills featuring a design that integrates lava rocks.
These lava rocks are formulated to reach the ideal cooking temperature quickly for more convenience when grilling.
The design of these lava rocks works to help conserve gas consumption to extend the life of your propane tank.
A: No any additive needed.
A: I no longer have the packaging but there is a bit of dust that comes off of these rocks. That said, I have them in my fire table that occasionally sees a rain storm. My deck is light gray. There is not staining or discoloration caused from the rocks.
A: Probably it's the perfect use for this lava rocks in a fire island LP Gas outdoor fire table as long as you don't use lava rocks to grill anything that produces dripping oil on the lava rocks that could cause smoke and fire.
A: Yes I did and it works fine
A: My parents use similar lava rocks for a filter in their Koi pond. But I wouldn't ever drink water filtered by just a few pounds of these.