expt  lab                  lat       lon         tank  treatment_pCO2  
1     lab_Edmunds_NMMBA    21.9382   120.7460    1     Ambient         
1     lab_Edmunds_NMMBA    21.9382   120.7460    7     Ambient         
1     lab_Edmunds_NMMBA    21.9382   120.7460    2     High            
1     lab_Edmunds_NMMBA    21.9382   120.7460    5     High