Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -rc67def50892f9a7c2f1f22985b5351465a8f6773 -r1a685471524555a374854c0c9ec8e208e71fe2df
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision c67def50892f9a7c2f1f22985b5351465a8f6773)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 1a685471524555a374854c0c9ec8e208e71fe2df)
@@ -138,8 +138,11 @@
     U32 msSinceLastVolumeCalc = calcTimeSince( resUseTimer );
     F32 flowRateMlPerMs = (F32)getTargetDialInFlowRate() / (F32)( MS_PER_SECOND * SEC_PER_MIN );
 
-    // calculate volume used from active reservoir
-    resUseVolumeMl += ( flowRateMlPerMs * msSinceLastVolumeCalc );  // TODO - should this calc be done and kept by Dialysis sub-mode?
+    // calculate volume used from active reservoir - do not accumulate if saline bolus in progress
+    if ( SALINE_BOLUS_STATE_IN_PROGRESS != getSalineBolusState() )
+    {
+        resUseVolumeMl += ( flowRateMlPerMs * msSinceLastVolumeCalc );  // TODO - should this calc be done and kept by Dialysis sub-mode?
+    }
     resUseTimer = getMSTimerCount();
 
     // treatment reservoir mgmt. state machine