Index: firmware/App/Monitors/Level.h
===================================================================
diff -u -r3417933e6edf61a914c428e2fa944b3b349272a4 -rae7a7f0dc06fd31a53b0db564d515ce4c39acf67
--- firmware/App/Monitors/Level.h	(.../Level.h)	(revision 3417933e6edf61a914c428e2fa944b3b349272a4)
+++ firmware/App/Monitors/Level.h	(.../Level.h)	(revision ae7a7f0dc06fd31a53b0db564d515ce4c39acf67)
@@ -37,7 +37,8 @@
 {
     D6_LEVL = 0,                        ///< floater switch low, medium and high status
     FIRST_DD_LEVL = D6_LEVL,            ///< First DD level
-    D63_LEVL,                           ///< bicarb level low or high status
+    D63_LEVL,                           ///< Bicarb upper level low or high status
+    D98_LEVL,                           ///< Bicarb lower level low or high status
     D46_LEVL,                           ///< Spent dialysate air separation chamber level low or high status
     LAST_DD_LEVL = D46_LEVL,            ///< Last DD level
     P25_LEVL,                           ///< FP level sensor
@@ -52,7 +53,8 @@
 /// floater and level sensor states.
 typedef enum level_States
 {
-    LEVEL_STATE_LOW = 0,                 ///< Low level
+    LEVEL_STATE_EMPTY = 0,               ///< Empty level
+    LEVEL_STATE_LOW,                     ///< Low level
     LEVEL_STATE_HIGH,                    ///< High level
     LEVEL_STATE_MEDIUM,                  ///< Medium level
     LEVEL_STATE_ILLEGAL,                 ///< Illegal level
@@ -63,7 +65,8 @@
 typedef struct
 {
     U32 d6Level;                        ///< Floater level
-    U32 d63Level;                       ///< Bicarb level
+    U32 d63Level;                       ///< Bicarb upper level
+    U32 d98Level;                       ///< Bicarb lower level
     U32 d46Level;                       ///< Spent dialysate level
 } DD_LEVEL_DATA_T;