In my latest venture the substrate is #6 glass beads. So far I am impressed. The stuff does not need washing, has no sharp corners, is white, is made of glass, so it is inert, and not very expensive. I think $20.00 for a 20kg bag.
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Bob
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To be loved you have to be nice to people every day - To be hated you don't have to do squat.
---------Homer Simpson--------
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