Don't discount the perlite. I used some pea gravel last year which was extremely rude and meant me bodily harm. Luckily I was uphill of them at the time of revolt.
PERLITE UNITE!! UNITE THE CLANS!!! KAPLAAAGHHH!
out.
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...out
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You haven't countered nothing, because the points you made are not valid, you are basing your counter on information you don't understand, regardless the accuracy of the information, because it does not state what you are saying.. (Brazko)