Better GH test
I have the API Liquid regeant test for GH and i have a small problem. Being partially color blind I have a really hard time telling when it turns from light orange to light green.
Is there a liquid regeant test that turns a different, more noticeable color for GH?
That's the only one my LFS carries. Even though liquid tests are better, in your case you might be better off buying a test strip just for that purpose. I have a hard time myself trying to decide when the color truly changes or how green it needs to be to qualify as a change.
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