Index: sources/view/hd/data/VTreatmentRanges.cpp
===================================================================
diff -u -r16a8f25568b4636ebc31e76c86a8031940cc4ad7 -r53ec19e12772f2a73190323438106dc93e4a12df
--- sources/view/hd/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision 16a8f25568b4636ebc31e76c86a8031940cc4ad7)
+++ sources/view/hd/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision 53ec19e12772f2a73190323438106dc93e4a12df)
@@ -54,19 +54,44 @@
  */
 void View::VTreatmentRanges::doSaveAcidConcentrate  (const QString &vOption)
 {
-    QString mCategory = ::Settings_Category_DataList;
+    QString mCategory = Storage::Settings_Category_DataList;
 
     _Settings.add(mCategory,
                   "Acid Concentrate Options",
                   vOption,
-                  QVariant(),
+                  QVariant("temp"), // set temp string to know to remove later
                   false );
 
     // update
-//    emit acidConcentrateOptionsChanged();
     acidConcentrateOptions ( _Settings.keys(mCategory, "Acid Concentrate Options" ));
 }
 
+/**
+ * \brief   VTreatmentRanges::doClearAcidConcentrate
+ * \param vSet - Bool to only clear options list if combobox is active
+ * \details Clear any custum Acid Concentrate entered by user
+ */
+void View::VTreatmentRanges::doClearAcidConcentrate  (const bool &vSet)
+{
+    if ( ! vSet ) { return; }
+
+    QString mCategory = Storage::Settings_Category_DataList;
+    int size = _Settings.keys(mCategory, "Acid Concentrate Options" ).size();
+
+    for ( int i = size - 1; i >= 0; --i ) {
+        // remove any populated values. The original from .config are empty strings
+        if ( ! _Settings.values(mCategory, "Acid Concentrate Options" )[i].toString().isEmpty() ) {
+            _Settings.remove(mCategory,
+                             "Acid Concentrate Options",
+                             _Settings.keys(mCategory, "Acid Concentrate Options")[i],
+                             _Settings.values(mCategory, "Acid Concentrate Options" )[i]);
+        }
+    }
+
+    // update
+    acidConcentrateOptions ( _Settings.keys(mCategory, "Acid Concentrate Options" ));
+}
+
 /*!
  * \brief   VTreatmentCreate::onSettingsDone
  * \details fills the items below, read from the settings file, when the reading is notified done by ApplicationController.