Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -rf3b83f75a19b975ad1abead662c8151a2907ac00 -r933a18d740285e70be9d00696ed0f5a5381bc8e4
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision f3b83f75a19b975ad1abead662c8151a2907ac00)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 933a18d740285e70be9d00696ed0f5a5381bc8e4)
@@ -8,7 +8,7 @@
 * @file DGInterface.h
 *
 * @author (last) Sean Nash
-* @date (last) 07-Jul-2020
+* @date (last) 05-Oct-2020
 *
 * @author (original) Sean
 * @date (original) 08-Apr-2020
@@ -32,8 +32,12 @@
 
 // ********** public definitions **********
 
-#define DRAIN_RESERVOIR_TO_VOLUME_ML        200                 ///< Drain reservoir to this volume (in mL) during treatment.
-#define FILL_RESERVOIR_TO_VOLUME_ML         1700                ///< Fill reservoir to this volume (in mL) during treatment.
+#define DRAIN_RESERVOIR_TO_VOLUME_ML        200                 ///< 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.
+#else
+#define FILL_RESERVOIR_TO_VOLUME_ML         1300                ///< Fill reservoir to this volume (in mL) during treatment.
+#endif
 
 /// Enumeration of DG reservoirs.
 typedef enum DG_Reservoirs