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#18
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![]() Using a Hagen NH3 test kit.
Increments from 0.0; 0.1, 0.3, 0.6, 1.2,... Never been a fan of these colour matching tests (that's why I switched to Salifert for pH) but I read it as 0.0, maybe 0.1 but definitely not matching 0.3. |