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On 9/29/06 2:44 PM, "jeff courtman" <[log in to unmask]> wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
> 
> we've been using rheoscopic fluid from Kalliroscope.  our fluid seems to
> settle out, sometimes in as little as 12 hours. sometimes it will stay in
> solution for several days, unagitated.
> 
> we've been told precipitation could be do to water contamination
> (bacterial?).
> 
> any insight, comments, alternate source material, etc. would be appreciated.
> 
> Jeff Courtman
> Exhibits & Special Projects Coordinator
> 251.208.6851
> Exploreum Science Center
> www.exploreum.net <http://www.exploreum.net/>
> 
> 
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I suggest filling the exhibit with a bleach water mixture, let it pump thru
for several hours (if this exhibit uses a pump), drain, rinse, & refill with
clean water, let that pump thru, drain & refill with distilled water &
rheoscopic fluid & bacterial stabilizer. Make sure there's no metal contact
with the fluid.

This procedure has worked well for us in our flow tunnel exhibit.

Good luck!

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