Index: sources/gui/qml/components/RangeSlider.qml
===================================================================
diff -u -r2dd4e9c952d65e68f1c81a1cfc13d1f96b0d7d43 -r94d069e17fbb5872b66a4926d769634eceb42e82
--- sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision 2dd4e9c952d65e68f1c81a1cfc13d1f96b0d7d43)
+++ sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision 94d069e17fbb5872b66a4926d769634eceb42e82)
@@ -122,17 +122,21 @@
     }
 
     function incrementMax(vInStepSegments) {
-        updateMaxValue(vInStepSegments, true)
+        if ( ! maxAdjusted ) { setMaxValue(_root.maxValueUpperBound )}
+        else                 { updateMaxValue(vInStepSegments, true )}
     }
     function decrementMax(vInStepSegments) {
-        updateMaxValue(vInStepSegments, false)
+        if ( ! maxAdjusted ) { setMaxValue(_root.maxValueUpperBound )}
+        else                 { updateMaxValue(vInStepSegments, false)}
     }
 
     function incrementMin(vInStepSegments) {
-        updateMinValue(vInStepSegments, true)
+        if ( ! minAdjusted ) { setMinValue(_root.minValueLowerBound )}
+        else                 { updateMinValue(vInStepSegments, true )}
     }
     function decrementMin(vInStepSegments) {
-        updateMinValue(vInStepSegments, false)
+        if ( ! minAdjusted ) { setMinValue(_root.minValueLowerBound )}
+        else                 { updateMinValue(vInStepSegments, false)}
     }
     ///
     /// \brief   grays out the rangebar and handler if not adjusted and hasAdjust set to true
Index: sources/gui/qml/components/Slider.qml
===================================================================
diff -u -r642f08650a7a88ad6a2305fdea6bd18365aab5c7 -r94d069e17fbb5872b66a4926d769634eceb42e82
--- sources/gui/qml/components/Slider.qml	(.../Slider.qml)	(revision 642f08650a7a88ad6a2305fdea6bd18365aab5c7)
+++ sources/gui/qml/components/Slider.qml	(.../Slider.qml)	(revision 94d069e17fbb5872b66a4926d769634eceb42e82)
@@ -132,6 +132,7 @@
 
     // real-time bound change should effect the current set value
     onMinimumChanged: {
+        if ( !isActive && inActiveZero ) { value = 0; return }
         if (value < minimum )
             value = minimum
     }
Index: sources/gui/qml/components/SliderArrows.qml
===================================================================
diff -u -r642f08650a7a88ad6a2305fdea6bd18365aab5c7 -r94d069e17fbb5872b66a4926d769634eceb42e82
--- sources/gui/qml/components/SliderArrows.qml	(.../SliderArrows.qml)	(revision 642f08650a7a88ad6a2305fdea6bd18365aab5c7)
+++ sources/gui/qml/components/SliderArrows.qml	(.../SliderArrows.qml)	(revision 94d069e17fbb5872b66a4926d769634eceb42e82)
@@ -49,11 +49,11 @@
         }
 
         onPressed: decrementValue()
-        onPressAndHold: {
-            _sliderAdjustValueTimer.isIncrementing = false
-            _sliderAdjustValueTimer.restart()
-        }
-        onReleased: _sliderAdjustValueTimer.stop()
+        // onPressAndHold: {
+        //     _sliderAdjustValueTimer.isIncrementing = false
+        //     _sliderAdjustValueTimer.restart()
+        // }
+        // onReleased: _sliderAdjustValueTimer.stop()
     }
 
     TouchRect { id: _incrementValueButton
@@ -71,25 +71,24 @@
         }
 
         onPressed: incrementValue()
-        onPressAndHold: {
-            _sliderAdjustValueTimer.isIncrementing = true
-            _sliderAdjustValueTimer.restart()
-        }
-        onReleased: _sliderAdjustValueTimer.stop()
+        // onPressAndHold: {
+        //     _sliderAdjustValueTimer.isIncrementing = true
+        //     _sliderAdjustValueTimer.restart()
+        // }
+        // onReleased: _sliderAdjustValueTimer.stop()
     }
 
-    Timer { id: _sliderAdjustValueTimer
-        property bool isIncrementing : true
-        interval: Variables.sliderAdjustPressAndHoldRefreshRate //ms
-        running : false
-        repeat  : true
-        onTriggered: {
-            if(isIncrementing)
-                incrementValue()
-            else
-                decrementValue()
-
-            //DEBUG console.log("timer triggered " + _root.value)
-        }
-    }
+    // Timer { id: _sliderAdjustValueTimer
+    //     property bool isIncrementing : true
+    //     interval: Variables.sliderAdjustPressAndHoldRefreshRate //ms
+    //     running : false
+    //     repeat  : true
+    //     onTriggered: {
+    //         if(isIncrementing)
+    //             incrementValue()
+    //         else
+    //             decrementValue()
+    //         //DEBUG console.log("timer triggered " + _root.value)
+    //     }
+    // }
 }
Index: sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml
===================================================================
diff -u -r642f08650a7a88ad6a2305fdea6bd18365aab5c7 -r94d069e17fbb5872b66a4926d769634eceb42e82
--- sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml	(.../PreTreatmentUltrafiltration.qml)	(revision 642f08650a7a88ad6a2305fdea6bd18365aab5c7)
+++ sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml	(.../PreTreatmentUltrafiltration.qml)	(revision 94d069e17fbb5872b66a4926d769634eceb42e82)
@@ -69,10 +69,10 @@
             topMargin: 425
         }
         isActive: false
-        width   : parent.width / 2
+        width   : Variables.ultrafiltrationProgressbarWidth
         step    : 0.100
         stepSnap: true
-        ticks   : false
+        ticks   : true
         diameter: Variables.sliderCircleDiameter
         decimal : Variables.ultrafiltrationPrecision
         minimum : Variables.ultrafiltrationMinDef
@@ -82,4 +82,19 @@
         onPressed: isActive = true
     }
 
+    SliderArrows{ id:_sliderArrows
+        anchors.verticalCenter  : _volumeSlider.verticalCenter
+        anchors.left            : _volumeSlider.right
+        anchors.leftMargin      : Variables.sliderAdjustButtonLeftMargin
+
+        onIncrementValue        : {
+            _volumeSlider.incrementValue(true)
+            _volumeSlider.isActive = true
+        }
+        onDecrementValue        : {
+            _volumeSlider.decrementValue(true)
+            _volumeSlider.isActive = true
+        }
+    }
+
 }