Index: firmware/App/Controllers/ConcentratePumps.h
===================================================================
diff -u -rdf87716215d606300dd2617a6854b7071c0ce545 -r15c7997efce023a44ee415b39b90530f3552bf31
--- firmware/App/Controllers/ConcentratePumps.h	(.../ConcentratePumps.h)	(revision df87716215d606300dd2617a6854b7071c0ce545)
+++ firmware/App/Controllers/ConcentratePumps.h	(.../ConcentratePumps.h)	(revision 15c7997efce023a44ee415b39b90530f3552bf31)
@@ -35,8 +35,8 @@
 #define DOSING_CONCENTRATE_PUMP_SPEED           100.0F              ///< Diener pump speed for acid and bicarb dosing pump speed in mL/min
 #define DRAIN_BICART_PUMP_SPEED                 200.0F              ///< Diener pump speed for cartridge drains at maximum speed in mL/min 
 
-#define DEFAULT_ACID_VOLUME_ML                  0.67F               ///< Acid concentrate volume in ml.
-#define DEFAULT_BICARB_VOLUME_ML                1.15F               ///< Bicarb concentrate volume in ml.
+#define DEFAULT_ACID_VOLUME_ML                  0.666666667F        ///< Acid concentrate volume in ml.
+#define DEFAULT_BICARB_VOLUME_ML                1.146666667F        ///< Bicarb concentrate volume in ml.
 
 #define DOSING_CONT_VOLUME                      0xFFFFFFFF          ///< Volume set to 0xFFFFFFFF enables continuous delivery based on the speed set.