The Planted Tank Forum - View Single Post - API GH Test Kit questions....
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post #4 of (permalink) Old 12-17-2012, 02:57 AM
Algae Grower
Join Date: Apr 2012
Location: Mississippi
Posts: 92
Originally Posted by Monster Fish View Post
The first drop is usually faint orange. When the color of the water sample changes, the color is usually a very light green. Once you see a change in color, you've reached your titration endpoint. In your case, since it only took you 2 drops to get the color change, it means you have a GH of 2 degrees.
I agree. If you had a higher hardness the color would be more intense, simply because you had a higher proportion of test liquid to water.
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