Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rfc78b1e5af6d7ab8f7656b410c4cacdfd76a49e6 -r53ad71e9e60164330b7fb33b9e4608ef3e17d155
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision fc78b1e5af6d7ab8f7656b410c4cacdfd76a49e6)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 53ad71e9e60164330b7fb33b9e4608ef3e17d155)
@@ -914,7 +914,7 @@
         getFillChemicalCondRecord( &chemicalsCond );
 
         F32 filledVolumeML                           = getReservoirWeight( inactiveRsrvr ) - reservoirBaseWeight;
-        F32 integratedVolumeToLoadCellReadingPercent = fabs( 1.0F - ( filledVolumeML / getIntegratedVolumeML() ) );
+        F32 integratedVolumeToLoadCellReadingPercent = fabs( 1.0F - ( getIntegratedVolumeML() / filledVolumeML ) ); // Filled volume more accurate and stable than the integrated volume from the flowmeter
         F32 avgAcidConductivity                      = acidConductivityTotal / conductivitySampleCount;
         F32 avgBicarbConductivity                    = bicarbConductivityTotal / conductivitySampleCount;
         F32 acidNormalConductivity                   = chemicalsCond.fillCondValues[ chemicalsTypes.acidType ][ FILL_COND_NORMAL_OP ].acidConduSPerCM;