Index: firmware/App/Modes/Dialysis.c
===================================================================
diff -u -r09e6cf9de34acf18f6e1138bf56ac0edb4821186 -r68aefeff8890cdfa956c7bfdf0d4505b4ac25cb7
--- firmware/App/Modes/Dialysis.c	(.../Dialysis.c)	(revision 09e6cf9de34acf18f6e1138bf56ac0edb4821186)
+++ firmware/App/Modes/Dialysis.c	(.../Dialysis.c)	(revision 68aefeff8890cdfa956c7bfdf0d4505b4ac25cb7)
@@ -1,6 +1,6 @@
 /**************************************************************************
 *
-* Copyright (c) 2019-2021 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2019-2022 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
@@ -26,6 +26,7 @@
 #include "ModeTreatment.h"
 #include "ModeTreatmentParams.h"
 #include "OperationModes.h"
+#include "Reservoirs.h"
 #include "SystemCommMessages.h"
 #include "TaskGeneral.h"
 #include "Timers.h"
@@ -191,6 +192,8 @@
     // Inform DG interface that dialysis has started/resumed
     dialysisResumed();
 
+    resetReservoirsVariables();
+
     // Set valves for dialysis
     setValvePosition( VDI, VALVE_POSITION_B_OPEN );
     setValvePosition( VDO, VALVE_POSITION_B_OPEN );
@@ -1176,4 +1179,18 @@
     resCurrVolume[ DG_RESERVOIR_2 ] = res2Vol;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The getReservoirUltrafiltrationVol function returns the ultrafiltration
+ * volume of a reservoir.
+ * @details Inputs: none
+ * @details Outputs: resStartVolume[], resFinalVolume[]
+ * @param reservoirID reservoir ID to calculate the ultrafiltration volume
+ * @return ultrafiltration volume of the reservoir
+ *************************************************************************/
+F32 getReservoirUltrafiltrationVol( DG_RESERVOIR_ID_T reservoirID )
+{
+    return ( resFinalVolume[ reservoirID ] - resStartVolume[ reservoirID ] );
+}
+
 /**@}*/