Index: firmware/App/DGCommon.h
===================================================================
diff -u -r54b7dbef86af8d97ed2edfc87f806295e45b5964 -r667b78a4ba1b948d4977b9b55234acf8d670f2d9
--- firmware/App/DGCommon.h	(.../DGCommon.h)	(revision 54b7dbef86af8d97ed2edfc87f806295e45b5964)
+++ firmware/App/DGCommon.h	(.../DGCommon.h)	(revision 667b78a4ba1b948d4977b9b55234acf8d670f2d9)
@@ -53,6 +53,7 @@
     #define THD_USING_TRO_CONNECTOR         1
     #define DISABLE_FLOW_CHECK_IN_FILL      1
     #define IGNORE_CONC_PUMP_IN_HEAT_DISINFECT  1
+//    #define NEW_FMD_FLOW_SENSOR             1
 
     // Turn these flags on to disable dialysate mixing
     #define DISABLE_DIALYSATE_CHECK         1
Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r54b7dbef86af8d97ed2edfc87f806295e45b5964 -r667b78a4ba1b948d4977b9b55234acf8d670f2d9
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 54b7dbef86af8d97ed2edfc87f806295e45b5964)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 667b78a4ba1b948d4977b9b55234acf8d670f2d9)
@@ -260,14 +260,14 @@
     F32 const measuredROFlowRate_mL_min = getMeasuredROFlowRate() * ML_PER_LITER;
     F32       bicarbPumpFlowRate_mL_min = measuredROFlowRate_mL_min * bicarb.bicarbConcentrate[ CAL_DATA_BICARB_CONCENTRATE_1 ].bicarbConcMixRatio +
                                           CONCENTRATE_PUMP_PRIME_EXTRA_SPEED_ML_MIN;
-
-    bicarbPumpFlowRate_mL_min = MIN( bicarbPumpFlowRate_mL_min, CONCENTRATE_PUMP_MAX_SPEED );
 #ifndef DISABLE_DIALYSATE_CHECK
     F32 const bicarbConductivity = getConductivityValue( CONDUCTIVITYSENSORS_CD2_SENSOR );
 #else
-    F32 const bicarbConductivity = MIN_BICARB_CONCENTRATE_CONDUCTIVITY;
+    F32 const bicarbConductivity = MAX_BICARB_CONCENTRATE_CONDUCTIVITY;
 #endif
 
+    bicarbPumpFlowRate_mL_min = MIN( bicarbPumpFlowRate_mL_min, CONCENTRATE_PUMP_MAX_SPEED );
+
     if ( MIN_BICARB_CONCENTRATE_CONDUCTIVITY <= bicarbConductivity )
     {
         // Reduce acid pump speed after reaching minimum conductivity
@@ -316,14 +316,14 @@
     F32 const measuredROFlowRate_mL_min = getMeasuredROFlowRate() * ML_PER_LITER;
     F32       acidPumpFlowRate_mL_min = measuredROFlowRate_mL_min * acid.acidConcentrate[ CAL_DATA_ACID_CONCENTRATE_1 ].acidConcMixRatio +
                                         CONCENTRATE_PUMP_PRIME_EXTRA_SPEED_ML_MIN;
-
-    acidPumpFlowRate_mL_min = MIN( acidPumpFlowRate_mL_min, CONCENTRATE_PUMP_MAX_SPEED );
 #ifndef DISABLE_DIALYSATE_CHECK
     F32 const acidConductivity = getConductivityValue( CONDUCTIVITYSENSORS_CD1_SENSOR );
 #else
-    F32 const acidConductivity = MIN_ACID_CONCENTRATE_CONDUCTIVITY;
+    F32 const acidConductivity = MAX_ACID_CONCENTRATE_CONDUCTIVITY;
 #endif
 
+    acidPumpFlowRate_mL_min = MIN( acidPumpFlowRate_mL_min, CONCENTRATE_PUMP_MAX_SPEED );
+
     if ( MIN_ACID_CONCENTRATE_CONDUCTIVITY <= acidConductivity )
     {
         // Reduce acid pump speed after reaching minimum conductivity
@@ -373,10 +373,12 @@
     {
         // Prime mixing before deliver result to reservoir
         handleDialysateMixing( measuredROFlowRate_mL_min );
+#ifndef DISABLE_MIXING
         requestConcentratePumpOn( CONCENTRATEPUMPS_CP1_ACID );
         requestConcentratePumpOn( CONCENTRATEPUMPS_CP2_BICARB );
 
         if ( concentratePumpPrimeCount++ > CONCENTRATE_PUMP_PRIME_INTERVAL )
+#endif
         {
             setValveState( VPO, VALVE_STATE_FILL_C_TO_NC );
             result = DG_FILL_MODE_STATE_DELIVER_DIALYSATE;
@@ -451,7 +453,7 @@
         result = DG_FILL_MODE_STATE_PAUSED;
     }
 #endif
-
+#ifndef DISABLE_MIXING
     if ( ( ACID_CONCENTRATION_BOTTLE_VOLUME_ML - getF32OverrideValue( &usedAcidVolume_mL ) ) <= CONCENTRATION_BOTTLE_LOW_VOLUME_ML )
     {
         activateAlarmNoData( ALARM_ID_DG_ACID_BOTTLE_LOW_VOLUME );
@@ -461,7 +463,7 @@
     {
         activateAlarmNoData( ALARM_ID_DG_BICARB_BOTTLE_LOW_VOLUME );
     }
-
+#endif
     // If we've reached our target fill to volume (by weight), we're done filling - go back to generation idle mode
     if ( TRUE == hasTargetFillVolumeBeenReached( inactiveReservoir ) )
     {
@@ -484,6 +486,7 @@
         }
 #endif
 
+        setValveState( VPO, VALVE_STATE_NOFILL_C_TO_NO );
         requestNewOperationMode( DG_MODE_GENE );
     }
 
Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -rba4d9696d4c0ac731775e0bcc5a7e50f65c90285 -r667b78a4ba1b948d4977b9b55234acf8d670f2d9
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision ba4d9696d4c0ac731775e0bcc5a7e50f65c90285)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 667b78a4ba1b948d4977b9b55234acf8d670f2d9)
@@ -275,7 +275,7 @@
     memcpy( payloadPtr, &dat2, sizeof( EVENT_DATA_T ) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
-    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_DG_2_UI, ACK_REQUIRED );
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_DG_2_UI, ACK_NOT_REQUIRED );
 
     return result;
 }