Index: firmware/App/Controllers/Ultrafiltration.c
===================================================================
diff -u -r623587d96bf6c0bafd3ff94d47f8c783b4b999f0 -r4cdcb589ad34efa472c94180e6de938132cbc89b
--- firmware/App/Controllers/Ultrafiltration.c	(.../Ultrafiltration.c)	(revision 623587d96bf6c0bafd3ff94d47f8c783b4b999f0)
+++ firmware/App/Controllers/Ultrafiltration.c	(.../Ultrafiltration.c)	(revision 4cdcb589ad34efa472c94180e6de938132cbc89b)
@@ -249,13 +249,13 @@
         // Fresh side dialysate density
         if ( getTestConfigStatus( TEST_CONFIG_DD_FP_ENABLE_BETA_1_0_HW ) == TRUE )
         {
-            freshDensity = ( COMP_SLOPE * getD4AverageTemperature() ) + COMP_INTERCEPT;
+            freshDensity = ( COMP_SLOPE * getFilteredTemperatureValue( D4_TEMP ) ) + COMP_INTERCEPT;
         }
         else
         {
-            freshDensity = ( COMP_SLOPE * getD99AverageTemperature() ) + COMP_INTERCEPT;
+            freshDensity = ( COMP_SLOPE * getFilteredTemperatureValue( D99_TEMP ) ) + COMP_INTERCEPT;
         }
-        spentDensity        = ( COMP_SLOPE * getD50AverageTemperature() ) + COMP_INTERCEPT;        // spent side dialysate density
+        spentDensity        = ( COMP_SLOPE * getFilteredTemperatureValue( D50_TEMP ) ) + COMP_INTERCEPT;        // spent side dialysate density
         compFreshFlowrate   = getTDDialysateFlowrate() * freshDensity;                             // Qd * fresh density
         compSpentFlowrate   = getTDDialysateFlowrate() * spentDensity;                             // Qd * spent density
         balancingError      = compFreshFlowrate - compSpentFlowrate;                               // Error in g/min