JBL Proaqua CO2-pH Permanent test kit (Long Term CO2 Reading) — East Ocean Aquatic
JBL CO2-pH Permanent Test
JBL PROAQUATEST CO2/pH Permanent
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