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Hello,
   We have columns of water with rheostatic fluid in them where air
bubbles up from the bottom- the bubbles push the water around and you
can see the swirls.  We've had problems with the breakdown of the
rheostatic fluid even after using a bacterial inhibitor and the
resulting sludge clogs the air lines.  The rheostatic company suggested
silicon oil instead of water.  Has anyone used such a thing?  Would a
switch over eliminate the problem?  Any other creative suggestions or
other liquid ideas?

Thanks, Jay

--
Jay Higgins
Program/Exhibit Developer
Providence Children's Museum
100 South Street
Providence, RI 02903
401.273.5437 x137

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