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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
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![TEST CO2 PERMANENT JBL [AQUA TEST] - YouTube](https://i.ytimg.com/vi/FMeH7STA1J8/maxresdefault.jpg "TEST CO2 PERMANENT JBL [AQUA TEST] - YouTube")
TEST CO2 PERMANENT JBL [AQUA TEST] - YouTube
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JBL PROAQUATEST CO2-pH Permanent
