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CO2 Test Kits

I won a Tetra CO2 test kit at my LSF. To my amazement, it actually
giving readings consistent with pH and kH measurements. You get a very
pink color to the sample. The ranges are very broad, not enough CO2,
2.5mg/l - 15 mg/l, and too much.

I had used a Red Sea kit, and never got a reading.