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Where's the yellow?
There has been so much discussion on using carbon to remove the yellow
color in aquarium water I deceided to check my own tanks, as one
I keep both a 90 gal planted tank and a 75 gal reef tank; neither has
ever been carbon filtered. The 90 gallon has been set up for 4 years,
and the 75 has been set up for 3. Both are very successful. I taped
a sheet of white paper at one end, and sighted along the length of the
tank (4 feet).
The result? A slight blue-green color. This is not because of the
water, but because of the glass--it has a slight blue-green color
(very distinct on the glass edge). Both tanks were manufactured by
O'Dell. Maybe the glass color masked the water color, but I don't
seem to have yellow water. Where's the problem?