Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -r5ab03489929d8cc5bbf47d8533d624fd8e4136c3 -ra9f55b2dd2aad22db9676faf661b81866b47affa
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 5ab03489929d8cc5bbf47d8533d624fd8e4136c3)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision a9f55b2dd2aad22db9676faf661b81866b47affa)
@@ -53,7 +53,7 @@
 #define CONCENTRATE_PUMP_VOLUME_TO_REVOLUTION               ( ( 1 / CONCENTRATE_PUMP_VOLUME_PER_REV ) * \
                                                               ( CONCENTRATE_PUMP_STEP_PER_REV * \
                                                                 CONCENTRATE_PUMP_MICRO_STEPS_PER_STEP ) )       ///< Convert volume in to number of revolutions needed.
-#define CONCENTRATE_PUMP_STEP_PERIOD_RESOLUTION             ( 0.25F / ( US_PER_SECOND * SEC_PER_MIN ) )         ///< Convert step period resolution (0.25 us) to minute.
+#define CONCENTRATE_PUMP_STEP_PERIOD_RESOLUTION             ( 0.50F / ( US_PER_SECOND * SEC_PER_MIN ) )         ///< Convert step period resolution (0.50 us) to minute.
 
 /// Volume output per pulse.
 #define CONCENTRATE_PUMP_VOLUME_PER_PULSE                   ( CONCENTRATE_PUMP_VOLUME_PER_REV / CONCENTRATE_PUMP_PULSE_PER_REV )
@@ -769,14 +769,14 @@
     if ( CONCENTRATEPUMPS_CP1_ACID == pumpId )
     {
         setFPGAAcidPumpSetStepSpeed( CONCENTRATE_PUMP_ZERO_FLOW_RATE );
-        concentratePumps[ CONCENTRATEPUMPS_CP1_ACID ].controlSet |= CONCENTRATE_PUMP_CONTROL_ENABLE_MASK;
-        setFPGAAcidPumpControl( concentratePumps[ CONCENTRATEPUMPS_CP1_ACID ].controlSet );
+        //concentratePumps[ CONCENTRATEPUMPS_CP1_ACID ].controlSet |= CONCENTRATE_PUMP_CONTROL_ENABLE_MASK;
+        //setFPGAAcidPumpControl( concentratePumps[ CONCENTRATEPUMPS_CP1_ACID ].controlSet );
     }
     else
     {
         setFPGABicarbSetStepSpeed( CONCENTRATE_PUMP_ZERO_FLOW_RATE );
-        concentratePumps[ CONCENTRATEPUMPS_CP2_BICARB ].controlSet |= CONCENTRATE_PUMP_CONTROL_ENABLE_MASK;
-        setFPGABicarbPumpControl( concentratePumps[ CONCENTRATEPUMPS_CP2_BICARB ].controlSet  );
+        //concentratePumps[ CONCENTRATEPUMPS_CP2_BICARB ].controlSet |= CONCENTRATE_PUMP_CONTROL_ENABLE_MASK;
+        //setFPGABicarbPumpControl( concentratePumps[ CONCENTRATEPUMPS_CP2_BICARB ].controlSet  );
     }
 
     // Park concentrate pump too if requested