Index: sources/view/hd/data/VTreatmentRanges.cpp
===================================================================
diff -u -r7d2122a9a4330ebc2ff4c22be36f32e9a82417ec -rda2dbdbd92d099e44d11bbfb2b794d5ee19a0f0a
--- sources/view/hd/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision 7d2122a9a4330ebc2ff4c22be36f32e9a82417ec)
+++ sources/view/hd/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision da2dbdbd92d099e44d11bbfb2b794d5ee19a0f0a)
@@ -55,15 +55,16 @@
 void View::VTreatmentRanges::doSaveAcidConcentrate  (const QString &vOption)
 {
     // check if unique
-    if ( _acidConcentrateOptions.contains(vOption) ) { return; }
+    if ( _acidConcentrateOptions.contains(vOption) ) { acidConcentrateAccepted(false); return; }
 
-    if ( ! _acidConcentrate.isEmpty() ) { _acidConcentrateOptions.removeLast(); }
+    if ( ! _acidConcentrate.isEmpty() ) { _acidConcentrateOptions.removeOne(_acidConcentrate); }
 
     _acidConcentrateOptions.append(vOption);
     acidConcentrate(vOption);
 
     // update
     emit acidConcentrateOptionsChanged(_acidConcentrateOptions);
+    acidConcentrateAccepted(true);
 }
 
 /**
@@ -75,7 +76,7 @@
 {
     if ( ! vSet ) { return; }
 
-    if ( ! _acidConcentrate.isEmpty() ) { _acidConcentrateOptions.removeLast(); }
+    if ( ! _acidConcentrate.isEmpty() ) { _acidConcentrateOptions.removeOne(_acidConcentrate); }
     acidConcentrate("");
 
     // update