The Planted Tank Forum - View Single Post - Built my first Tank and Found a deep scratch
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Old 11-16-2012, 12:18 PM   #7
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The "Inner Bead" is simply the thin silicone layer between the viewing panes of glass. The "Outer Bead" is the thicker silicone layer than spans the points where the viewing panes meet at the eight inner corners of the tank.
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