I have not used diatomite before (actually never seen it first hand) but I would really like to try it.
What I don't know is, is diatomaceous earth the same anywhere? I have found a supplier up here, relatively close but is it the same thing?
http://diatomaceousearthonline.com.au/s ... -additive/
In the description it says it is useful in bonsai and I know 15mm is probably too big for a pot but I have a sieve... Basically is this the same thing as down south?

Thanks in advance
Grant