other than the crushed glass being possibly less dusty, not sure where that idea of non-silica glass came from Splib, but you've been misinformed, glass is basically silica sand wink

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics