Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -r6742785597228dba2009e73a9de3f85024d4c82a -rebbb1f85550a1f9b8f946655f7b2b63f76fbf67d
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 6742785597228dba2009e73a9de3f85024d4c82a)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision ebbb1f85550a1f9b8f946655f7b2b63f76fbf67d)
@@ -41,8 +41,8 @@
 #define CONCENTRATE_PUMP_ERROR_TOLERANCE                    0.02                                                ///< Measured speed needs to be within 2% of commanded speed.
 #define CONCENTRATE_PUMP_ZERO_FLOW_RATE                     0xFFFF                                              ///< Pulse width value when zero flow rate or pump is off.
 
-#define CONCENTRATE_PUMP_VOLUME_PER_REV                     0.1                                                 ///< Volume output every revolution (mL).
-#define CONCENTRATE_PUMP_PULSE_PER_REV                      2.0                                                 ///< Number of pulses generate for every revolution.
+#define CONCENTRATE_PUMP_VOLUME_PER_REV                     0.15                                                ///< Volume output every revolution (mL).
+#define CONCENTRATE_PUMP_PULSE_PER_REV                      4.0                                                 ///< Number of pulses generate for every revolution.
 #define CONCENTRATE_PUMP_STEP_PER_REV                       200.0                                               ///< Number of steps for every revolution.
 #define CONCENTRATE_PUMP_HALL_SENSE_PERIOD_RESOLUTION       100.0                                               ///< Hall sense period resolution in microseconds.
 
@@ -53,7 +53,7 @@
 #define CONCENTRATE_PUMP_VOLUME_PER_PULSE                   ( CONCENTRATE_PUMP_VOLUME_PER_REV / CONCENTRATE_PUMP_PULSE_PER_REV )
 
 #define CONCENTRATE_PUMP_DATA_PUBLISH_INTERVAL              ( 500 / TASK_GENERAL_INTERVAL )                     ///< Interval (ms/task time) at which the concentrate pump is monitored.
-#define CONCENTRATE_PUMP_CONTROL_INTERVAL                   ( 250 / TASK_GENERAL_INTERVAL )                     ///< Interval (ms/task time) at which the concentrate pump is controlled.
+#define CONCENTRATE_PUMP_CONTROL_INTERVAL                   ( 500 / TASK_GENERAL_INTERVAL )                     ///< Interval (ms/task time) at which the concentrate pump is controlled.
 #define CONCENTRATE_PUMP_SPEED_CONTROL_PERSISTENCE_PERIOD   ( 5 * MS_PER_SECOND )                               ///< Persistence period for concentrate pump speed control error.
 
 /// Enumeration of concentrate pump states.
@@ -268,14 +268,10 @@
             targetSpeed_ml_min *= -1.0;
         }
 
-        if ( targetSpeed_ml_min <= CONCENTRATE_PUMP_MAX_SPEED )
+        if ( ( CONCENTRATE_PUMP_MIN_SPEED <= targetSpeed_ml_min ) && ( targetSpeed_ml_min <= CONCENTRATE_PUMP_MAX_SPEED ) )
         {
             concentratePumps[ pumpId ].pumpTargetSpeed = targetSpeed_ml_min;
         }
-        else if ( CONCENTRATE_PUMP_MIN_SPEED <= targetSpeed_ml_min )
-        {
-            concentratePumps[ pumpId ].pumpTargetSpeed = 0.0;
-        }
         else
         {
             SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_CONCENTRATE_PUMP_SPEED_OUT_OF_RANGE, targetSpeed_ml_min )
@@ -547,7 +543,7 @@
     {
         F32 const absSpeed = fabs( value );
 
-        if ( absSpeed <= CONCENTRATE_PUMP_MAX_SPEED )
+        if ( ( CONCENTRATE_PUMP_MIN_SPEED <= absSpeed ) && ( absSpeed <= CONCENTRATE_PUMP_MAX_SPEED ) )
         {
             result = TRUE;
             setConcentratePumpTargetSpeed( (CONCENTRATE_PUMPS_T)pumpId, value );