Can someone help me with this thing? I'm setting up my tank and just wanted to get some preliminary numbers as a baseline. My ph seems to be around 7.6 (photo attached shoes PH and high range PH), my KH turned from blue to yellow at drops 14-15, but my GH (which is supposed to turn green) doesn't seem to want to change from yellow. I was at about 18 drops then started doing 2 drops at a time for a few turns. After I got to about 24-26 drops I just squirted in a bunch and still no change of color. Is this normal?
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