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Re: tops and lids

Acrylic is more transparent to light by about 7% I believe, but just go to
the web page of somebody like Tenecor (acrylic tank maker) and they will
extoll the virtues of acrylic.

While it will be much lighter (weight) it will evenutally warp as the
acrylic absorbs water, but you can just flip it over to unwarp it back the
other way.
o    Mike Nielsen                                                        u 
m    Department of Geography         THE OPTIMIST BELIEVES WE LIVE IN    ? 
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e    mnielsen at u_arizona.edu                                              o