Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rf4e66733b41e6875496761c969fa9e87874c21d3 -r72186ef257b97cd1af2618bf5805673695e6748d
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision f4e66733b41e6875496761c969fa9e87874c21d3)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 72186ef257b97cd1af2618bf5805673695e6748d)
@@ -46,10 +46,11 @@
 /// TODO: Restore to 100 when DPi flow control is fixed.
 #define DIP_PATIENT_CONNECTION_FLOW_RATE_ML_MIN         250             ///< Patient connection sub-mode dialysate inlet pump flow rate in mL/min.
 
-#define PRE_TREATMENT_MIN_RESERVOIR_VOLUME_ML           125             ///< Fill reservoir to this volume minimum to prep volume during development.
+#define PRE_TREATMENT_MIN_RESERVOIR_VOLUME_ML           250             ///< Fill reservoir to this volume minimum to prep volume during development.
 #define PRE_TREATMENT_FLUSH_RESERVOIR_VOLUME_ML         500             ///< Fill reservoir to this volume (in mL) to flush filter and lines.
 #define PRE_TREATMENT_FILL_RESERVOIR_ONE_VOLUME_ML      900             ///< Fill reservoir one to this volume (in mL) during pre-treatment mode.
 #define PRE_TREATMENT_FILL_RESERVOIR_TWO_VOLUME_ML      1100            ///< Fill reservoir two to this volume (in mL) during pre-treatment mode.
+#define PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML          1500            ///< Fill reservoir to this volume minimum to prep volume during development.
 
 /// States of the pre-treatment reservoir management state machine.
 typedef enum PreTreatmentReservoirMgmt_States
@@ -1173,7 +1174,7 @@
             if ( FALSE == reservoirFlushedStatus[ DG_RESERVOIR_1 ] )
             {
 #ifndef _RELEASE_
-                if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_PRIMING ) )
+                if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_FILL_AND_FLUSH ) )
                 {
                     reservoirFilledStatus[ DG_RESERVOIR_1 ] = TRUE;
                 }
@@ -1276,7 +1277,7 @@
  *************************************************************************/
 static U32 getPreTreatmentFillVolume( DG_RESERVOIR_ID_T inactiveRes )
 {
-    U32 volume = 0;
+    U32 volume = PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML;
 
     // Fill volumes after flushing
     if ( TRUE == reservoirFlushedStatus[ inactiveRes ] )
@@ -1286,7 +1287,7 @@
 #ifndef _RELEASE_
             if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_FILL_AND_FLUSH ) )
             {
-                volume = PRE_TREATMENT_MIN_RESERVOIR_VOLUME_ML;
+                volume = PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML;
             }
 
             else
@@ -1301,7 +1302,7 @@
 #ifndef _RELEASE_
             if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_FILL_AND_FLUSH ) )
             {
-                volume = PRE_TREATMENT_MIN_RESERVOIR_VOLUME_ML;
+                volume = PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML;
             }
             else
 #endif
@@ -1316,7 +1317,7 @@
 #ifndef _RELEASE_
         if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_FILL_AND_FLUSH ) )
         {
-            volume = PRE_TREATMENT_MIN_RESERVOIR_VOLUME_ML;
+            volume = PRE_TREATMENT_FULL_RESERVOIR_VOLUME_ML;
         }
         else
 #endif