"Jon Pike" wrote in message
. 159...
Should water tests be read with a light shining through it, and held up
against the white part of the card, or in shadow, held up against the
white
part of the card?

--
http://www.neopets.com/refer.phtml?username=moosespet

I don't think it matters much really as long as the same amount goes
through the tester as hits the color gradients. For me, i have always tested
without adding light that would cast any heavy shadows as well as testing
before any changes to the water. :-)

-James