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