Index: firmware/App/Controllers/MixingControl.h
===================================================================
diff -u -rf364406cd1f672078ca38ae8aad5bc508e9b64dd -rcf3c037762699407089411de04bc9d1f4b597784
--- firmware/App/Controllers/MixingControl.h	(.../MixingControl.h)	(revision f364406cd1f672078ca38ae8aad5bc508e9b64dd)
+++ firmware/App/Controllers/MixingControl.h	(.../MixingControl.h)	(revision cf3c037762699407089411de04bc9d1f4b597784)
@@ -41,8 +41,10 @@
     U32 bicarbControlInterval;                          ///< Bicarb Control interval
     U32 acidMixingState;                                ///< Acid mixing state
     U32 acidControlInterval;                            ///< Acid control interval
-    F32 bicarbVolume;                                   ///< Mixing control bicarb mix volume
-    F32 acidVolume;                                     ///< Mixing control acid mix volume
+    F32 currentBicarbMixVolume;                         ///< Mixing control current bicarb mix volume
+    F32 lastBicarbMixVolume;                            ///< Mixing control last bicarb mix volume
+    F32 currentAcidMixVolume;                           ///< Mixing control current acid mix volume
+    F32 lastAcidMixVolume;                              ///< Mixing control last acid mix volume
     // TODO: remove after closed loops stabilized
     PI_CONTROLLER_SIGNALS_DATA bicarbData;              ///< Mixing control bicarb mixing closed loop control signals data
     PI_CONTROLLER_SIGNALS_DATA acidData;                ///< Mixing control acid mixing closed loop control signals data