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Saltair

Aquarium Advice Freak
Joined
Nov 3, 2010
Messages
201
Location
New England
I have the API Master Kit for Freshwater. Do you hold the tubes up to the white card alonside the color samples or look through the tube with no background when determining your results?
 
please ignore... When I tried searching this I got a million unrealted answers. As soon as I posted threads with the answer came right up.
 
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