Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -r6419179374edcd65da462de84e8aeaefb7e20320 -r316f8773970f94c9b1996a03f2235050afb514da
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 6419179374edcd65da462de84e8aeaefb7e20320)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 316f8773970f94c9b1996a03f2235050afb514da)
@@ -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 );