AusBonsai

There is so much information on this forum about aggregate size of growing media available I thought I should pass this on incase there is a enterprising desperado out there with the bucks to drop on a rock crusher used in gold mining. I found two adds in Gem & Treasure magazine. The machines start at about $3000 but it may be a viable option. I don't know how much control the machines have over aggregate size but you could always add it to your muesli if you go too far.....with the diatomite that is!! Never consume scoria as I don't think it would make you feel very well at all and passing it would bring only tears for all concerned I'm sure. Anyway here are the links for those that dream of 2-7mm heaven.

http://www.armstrongindustries.com.au
http://www.reedsprospecting.com.au/shop ... equipment/

Check out the videos there out. All you end up with is powder:(