Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -rd4e5e5e155cd938823ee8eb8b090355e1fcc37a2 -r88fdd83b43ef9c2d2f06a51e555db1439b668921
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision d4e5e5e155cd938823ee8eb8b090355e1fcc37a2)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 88fdd83b43ef9c2d2f06a51e555db1439b668921)
@@ -64,6 +64,7 @@
 static BOOL isPumpOffRequested;                                         ///< Flag indicates a request to turn concentrate pumps off.
 static U32 concentratePumpControlTimerCounter;                          ///< Timer counter to perform control on concentrate pump.
 static U32 concentratePumpMonitorTimerCounter;                          ///< Timer counter to perform monitor on concentrate pump.
+
 /// Concentrate pump data publish interval.
 static OVERRIDE_U32_T concentratePumpDataPublishInterval = { CONCENTRATE_PUMP_DATA_PUBLISH_INTERVAL, CONCENTRATE_PUMP_DATA_PUBLISH_INTERVAL, 0, 0 };
 
Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r945dcc1391faefe5f4ddb4f505361501d008e293 -r88fdd83b43ef9c2d2f06a51e555db1439b668921
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 945dcc1391faefe5f4ddb4f505361501d008e293)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 88fdd83b43ef9c2d2f06a51e555db1439b668921)
@@ -131,7 +131,14 @@
     return fillState;
 }
 
-
+/*********************************************************************//**
+ * @brief
+ * The handleCheckInletWaterState function checks for inlet water quality
+ * before jumping to dialysate production state.
+ * @details Inputs: Temperature and conductivity alarms
+ * @details Outputs: request concentrate pump on and set RO pump flow rate
+ * @return the next state
+ *************************************************************************/
 static DG_FILL_MODE_STATE_T handleCheckInletWaterState( void )
 {
     DG_FILL_MODE_STATE_T result = DG_FILL_MODE_STATE_CHECK_INLET_WATER;
@@ -230,6 +237,14 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleDialysateMixing function handles the dialysate mixing by setting
+ * the concentrate pump speed relative to the RO pump flow rate.
+ * @details Inputs: none
+ * @details Outputs: Set concentrate pump speed relative to RO pump flow rate
+ * @return none
+ *************************************************************************/
 static void handleDialysateMixing( void )
 {
     // Set concentrate pumps speed based off RO pump flow rate