Index: sources/gui/qml/pages/pretreatment/PreTreatmentConsumablesStack.qml
===================================================================
diff -u -r695e95aa2ec5e6e1c395567449ac0f671ecd61ed -rbd01334f257c35b96b7b232beacbcd7fae60c852
--- sources/gui/qml/pages/pretreatment/PreTreatmentConsumablesStack.qml	(.../PreTreatmentConsumablesStack.qml)	(revision 695e95aa2ec5e6e1c395567449ac0f671ecd61ed)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentConsumablesStack.qml	(.../PreTreatmentConsumablesStack.qml)	(revision bd01334f257c35b96b7b232beacbcd7fae60c852)
@@ -42,22 +42,23 @@
 
     PreTreatmentBase { id: _preTreatmentConsumablesSelfTest
         header.confirmVisible   : false /* the state shall automatically change after user confirms the consumables installation */
-        header.confirmEnabeled  : vPreTreatmentStates.selfTestConsumables_complete
+        header.confirmEnabled   : vPreTreatmentStates.selfTestConsumables_complete
         isComplete              : vPreTreatmentStates.selfTestConsumables_complete
         title.text              : qsTr("Consumables Self Test")
+        // check List
         hasCheckList            : true
         checkListStepNames      : [
-            qsTr("Water Quality Check"),
+            //qsTr("Water Quality Check"), // this happens too fast and can't be sent to the UI.
             qsTr("BiCarb Pump Check")  ,
             qsTr("Acid Pump Check")    ,
         ]
     }
 
     Connections { target: vPreTreatmentStates
         onSelfTestConsumables_installChanged        : { if ( vselfTestConsumables_install       )   page( _preTreatmentConsumablesInstall           )}
-        onSelfTestConsumables_waterQualityEntered   : { _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vselfTestConsumables_waterQuality   )}
-        onSelfTestConsumables_biCarbPumpEntered     : { _preTreatmentConsumablesSelfTest.checkList.setItem( 1, vselfTestConsumables_biCarbPump     )}
-        onSelfTestConsumables_acidPumpEntered       : { _preTreatmentConsumablesSelfTest.checkList.setItem( 2, vselfTestConsumables_acidPump       )}
+        // onSelfTestConsumables_waterQualityEntered   : { _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vselfTestConsumables_waterQuality   )}
+        onSelfTestConsumables_biCarbPumpEntered     : { _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vselfTestConsumables_biCarbPump     )}
+        onSelfTestConsumables_acidPumpEntered       : { _preTreatmentConsumablesSelfTest.checkList.setItem( 1, vselfTestConsumables_acidPump       )}
     }
 
     Connections { target: _preTreatmentConsumablesInstall
@@ -75,5 +76,8 @@
         if (visible) {
             _mainMenu.hidden = true
         }
+        else {
+            stackView.initialItem = null
+        }
     }
 }