Index: firmware/App/Controllers/ConcentratePumps.h
===================================================================
diff -u -rf1dc3383b840c39f202b15679e0bbe2b2f7a2f83 -r42541cc4700d748d524400f61d99e288a0e11f3e
--- firmware/App/Controllers/ConcentratePumps.h	(.../ConcentratePumps.h)	(revision f1dc3383b840c39f202b15679e0bbe2b2f7a2f83)
+++ firmware/App/Controllers/ConcentratePumps.h	(.../ConcentratePumps.h)	(revision 42541cc4700d748d524400f61d99e288a0e11f3e)
@@ -32,7 +32,8 @@
 // ********** public definitions **********
 // For 150 RPM, Diener pump delivers 60ml/min
 #define CONCENTRATE_PUMP_MAX_SPEED              200.0F              ///< Maximum Diener pump speed for concentrate pump in mL/min
-#define DOSING_ACID_CONCENTRATE_PUMP_SPEED      100.0F              ///< Diener pump speed for acid pump
+#define CONCENTRATE_PUMP_MIN_SPEED              20.0F               ///< Minimum Diener pump speed for concentrate pump in mL/min
+#define DOSING_ACID_CONCENTRATE_PUMP_SPEED      60.0F               ///< Diener pump speed for acid pump
 #define DOSING_CONCENTRATE_PUMP_SPEED           100.F               ///< Dosing pump speed for spent chamber fill for acid and bicarb pumps
 #define DRAIN_BICART_PUMP_SPEED                 200.0F              ///< Diener pump speed for cartridge drains at maximum speed in mL/min