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If I remember the old books correctly this kind of sand also helps keep bugs down because they don't like the lime in the limestone.
Best,
Karen
I honestly don't know but we will have this as a topper in the SOP pens. The plan is to have three segments...first an 8 inch base of one inch stone then 8 inches of pea gravel then finally 6 inches of slag. Each part will be 'walked', then rolled in. It should be as solid as concrete but have drainage. This will obviously have to be done before pens can be set up.