jazzgeek said:It's probably best if you qualify this so the inexperienced are not confused.
"Pure" vermiculite is the same.....but many garden shops will sell vermiculite that's treated and/or mixed with fertilizers, antifungals, and other minerals.
You definitely don't want to use that as an incubation medium.
regards,
jazz
Jazz is very correct so whenever you buy vermiculite asked for the natural stuff (Not treated and/or mixed with fertilisers)
It is probably cheaper to buy it from garden centres/shops and you can buy it in bulk.
Good Luck.