Index: sources/view/td/data/VTreatmentRanges.cpp
===================================================================
diff -u -r1164ea502e3fabdb55aa41923e0e566505f197ef -r863906f104a18dbe6020b939b739214679d49d8a
--- sources/view/td/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision 1164ea502e3fabdb55aa41923e0e566505f197ef)
+++ sources/view/td/data/VTreatmentRanges.cpp	(.../VTreatmentRanges.cpp)	(revision 863906f104a18dbe6020b939b739214679d49d8a)
@@ -121,19 +121,48 @@
  */
 void View::VTreatmentRanges::doPopulateAcidConcentrate (const int &vSet, const int &vIndex)
 {
+    QString mAcidConcentrate;
+    QStringList values;
+    bool ok1 = false;
+    bool ok2 = false;
+    float potassiumValue = 0;
+    float calciumValue = 0;
+
     enum AcidConcentrates {
         ePotassium  ,
         eCalcium    ,
         eMagnesium  ,
     };
 
-    if ( ! vSet )     { return; }
+    static const QRegularExpression splitRegex("[^0-9.]");
 
-    QString mAcidConcentrate    =_acidConcentrateOptions[vIndex];
-    QStringList values          = mAcidConcentrate.split(QRegExp("[^0-9.]"), Qt::SkipEmptyParts);
-    potassium   (values.value(AcidConcentrates::ePotassium) .toFloat());
-    calcium     (values.value(AcidConcentrates::eCalcium)   .toFloat());
-    didPopulateAcidConcentrate();
+    if ( ! vSet )                                   goto lOut;
+
+    // Check vIndex out of range
+    if ( vIndex < 0 ||
+         vIndex >= _acidConcentrateOptions.size())  goto lOut;
+
+    mAcidConcentrate    =_acidConcentrateOptions.at(vIndex);
+    values          = mAcidConcentrate.split(splitRegex, Qt::SkipEmptyParts);
+
+    // Check string missing numbers
+    if ( values.size() < 2 )                        goto lOut;
+
+    ok1 = false;
+    ok2 = false;
+    potassiumValue    = values.value(AcidConcentrates::ePotassium) .toFloat(&ok1);
+    calciumValue      = values.value(AcidConcentrates::eCalcium)   .toFloat(&ok2);
+
+    // check float conversion
+    if ( ! ok1 || ! ok2 )                           goto lOut;
+
+    potassium(potassiumValue);
+    calcium(calciumValue);
+
+    emit didPopulateAcidConcentrate();
+
+lOut:
+    return;
 }
 
 /*!