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Best Test Kit for Varied Colors?

278 Views 1 Reply 2 Participants Last post by  en7jos
I have the API Master Test Kit, but I have a lot of trouble determining the results. Maybe I'm doing it wrong--I try to stand in a well lit room with the vial against the white part of the card, and judge the color, but the colors listed all seem to be close together.

Are there any other test kits one can recommend where the colors are more varied?
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