Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -rb4bc2e0337b358ee180650101d98e18346bf7c22 -r93156ec3080112357d4cd115ab2e9a23c6ab152d
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision b4bc2e0337b358ee180650101d98e18346bf7c22)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 93156ec3080112357d4cd115ab2e9a23c6ab152d)
@@ -32,12 +32,15 @@
 
 // ********** public definitions **********
 
-#define DRAIN_RESERVOIR_TO_VOLUME_ML        0       ///< Drain reservoir to this volume (in mL) during treatment.
+#define DRAIN_RESERVOIR_TO_VOLUME_ML            0       ///< Drain reservoir to this volume (in mL) during treatment.
 #ifndef V1_5_SYSTEM
-#define FILL_RESERVOIR_TO_VOLUME_ML         1700    ///< Fill reservoir to this volume (in mL) during treatment.
+#define FILL_RESERVOIR_TO_VOLUME_ML             1700    ///< Fill reservoir to this volume (in mL) during treatment.
 #else
-#define FILL_RESERVOIR_TO_VOLUME_ML         1300    ///< Fill reservoir to this volume (in mL) during treatment.
+#define FILL_RESERVOIR_TO_VOLUME_ML             1300    ///< Fill reservoir to this volume (in mL) during treatment.
 #endif
+
+#define FILL_RESERVOIR_TO_VOLUME_LOW_FLOW_ML    1300    ///< Fill reservoir to this volume (in mL) during treatment if dialysate flow is slow.
+#define SLOW_DIALYSATE_FLOW_ML_MIN              250     ///< Threshold for slow dialysate flow designation.
 
 /// Enumeration of DG pressure sensors.
 typedef enum DG_PressureSensors
@@ -133,6 +136,7 @@
 F32 getDGROPumpFlowRateMlMin( void );
 U32 getDGDrainPumpRPMSetPt( void );
 F32 getLoadCellWeight( LOAD_CELL_ID_T loadCellID );
+F32 getReservoirWeight( DG_RESERVOIR_ID_T resID );
 F32 getReservoirWeightLargeFilter( DG_RESERVOIR_ID_T resID );
 
 void setDGOpMode( U32 opMode, U32 subMode );