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JBL PROAQUATEST CO2-pH Permanent
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JBL CO2-pH Permanent Test
JBL PROAQUATEST CO2-pH Permanent
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JBL CO2-pH Permanent Test
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JBL PROAQUATEST CO2-pH Permanent
Why is my co2 drop checker constantly blue? I am using the JBL Permanent Co2 plus pH Aquatest. The instructions indicate that you add 35 drops of the provided tester liquid into
