Sadly, that is only for nano-streams. These are the big 6105 pumps. I think that the idea of a small acrylic piece with sand glued to it might be a great option.
I'm a little worried about the strength of the magnets. I know that Tunze says they hold better in water but right now, the magnets on these are rated for 15mm glass and they can't hold the pump without support at the moment...it slides down the wall. My glass is generally 12mm but on that overflow wall, I have two panes totaling 15mm. They make an extension for them that increases the strength to 20mm but I'm waiting until water is in there to check before I spend the $75 to get them.
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Mark...
290g Peninsula Display, 425g total volume. Setup Jan 2013.
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