diff --git a/redox/redox.dat b/redox/redox.dat
index 794659a7..5147774a 100644
--- a/redox/redox.dat
+++ b/redox/redox.dat
@@ -23,8 +23,8 @@ SOLUTION_MASTER_SPECIES
     Cl            Cl-              0     Cl              35.453
     C             CO3-2            2     HCO3            12.0111
     C(4)          CO3-2            2     HCO3            12.0111
-    Methane       MethaneH4        0     MethaneH4       16.0143
-    Alkalinity    CO3-2            1     Ca0.5(CO3)0.5 50.05
+    Methane       MethaneH4        0     MethaneH4       12.0111
+    Alkalinity    CO3-2            1     Ca0.5(CO3)0.5   50.05
     Sulfate       SulfateO4-2      0     SulfateO4       32.064
     Sulfide       HSulfide-        1     Sulfide         32.064
     Nitrate       NitrateO3-       0     Nitrate         14.0067