Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -re2a7289fade72dfc5426629eeb288395d894b3ec -r9aa7ae70106b8c96224cb541d24125215d85237e
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision e2a7289fade72dfc5426629eeb288395d894b3ec)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 9aa7ae70106b8c96224cb541d24125215d85237e)
@@ -318,7 +318,7 @@
     F32 totalTargetFillFlow   = targetFillFlowRate + ( targetFillFlowRate * ratios.acidMixingRatio ) +
                                                      ( targetFillFlowRate * ratios.bicarbMixingRatio );
     // Time fill = Fill volume / Qfill. Qfill is converted from L/min to mL/min and the time is converted from minutes to milliseconds
-    U32 timeFillMS            = ( getTargetFillVolumeBasedOnDialysateFlowML() / ( ML_PER_LITER * totalTargetFillFlow ) ) * SEC_PER_MIN * MS_PER_SECOND;
+    U32 timeFillMS            = ( prevTargetFillVolumeML / ( ML_PER_LITER * totalTargetFillFlow ) ) * SEC_PER_MIN * MS_PER_SECOND;
     // Add the prepare time in the DG mode fill to the calculated fill time in milliseconds
     U32 timeTotalFillMS       = timeFillMS + ratios.timeFillPrepMS;