The Planted Tank Forum - View Single Post - API GH Test Kit questions....
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post #7 of (permalink) Old 12-17-2012, 04:35 PM
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etgregoire's Avatar
Join Date: Oct 2009
Location: Cincinnati, Ohio
Posts: 280
Try looking at the test tubes from the top down. You're looking through the entire tube so the color is more intense.

I agree these are hard to read. I have problems with color blindness - and because these are orange/green it certainly isn't easy for someone with a red/green deficiency which I believe is one of the most prevalent cases of color blindness.

I have found though, that after several drops there will become a definitive change... I just usually start off adding 3-5 drops right away, knowing that I'm not going to see a change.
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