Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rcc9b6f5543a7523b2173eeb5c12e81916b3e1027 -r2046b91dd8e5255afa2e97684de2819931c45ac4
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision cc9b6f5543a7523b2173eeb5c12e81916b3e1027)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 2046b91dd8e5255afa2e97684de2819931c45ac4)
@@ -7,8 +7,8 @@
 *
 * @file    ModeFill.c
 *
-* @author  (last)      Dara Navaei
-* @date    (last)      07-Apr-2023
+* @author  (last)      James Walter Taylor
+* @date    (last)      11-Apr-2023
 *
 * @author  (original)  Leonardo Baloa
 * @date    (original)  19-Nov-2019
@@ -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;