10 Year Member!
- Feb 5, 2011
- Location (City and/or State)
I’m curious how it works for filtering. I was under the impression it it useless when wet
It's heat treated to change the structure of the silica, and then it's just like using sand for a filter medium but much finer.
The change in structure also makes it much more hazardous to inhale and more likely to cause silicosis compared to the risk of food grade.