Use already available shaderEffectSource and improve bloom look at low quality by limiting minimum radius.

app/qml/TerminalContainer.qml

@@ -1,6 +1,8 @@
 import QtQuick 2.2
 import QtGraphicalEffects 1.0
 
+import "utils.js" as Utils
+
 ShaderTerminal{
     property alias title: terminal.title
     property alias terminalSize: terminal.terminalSize
@@ -45,9 +47,10 @@ ShaderTerminal{
         asynchronous: true
         width: parent.width * appSettings.bloomQuality
         height: parent.height * appSettings.bloomQuality
+
         sourceComponent: FastBlur{
-            radius: 48 * appSettings.bloomQuality * appSettings.windowScaling
-            source: terminal.mainTerminal
+            radius: Utils.lint(16, 48, appSettings.bloomQuality * appSettings.windowScaling);
+            source: terminal.mainSource
             transparentBorder: true
         }
     }

app/qml/frames/utils/TerminalFrame.qml

@@ -83,7 +83,7 @@ Item{
         sourceComponent: FastBlur{
             id: frameReflectionEffect
             radius: 128
-            source: terminal.kterminal
+            source: terminal.mainSource
             smooth: false
         }
     }

app/qml/utils.js

@@ -1,5 +1,8 @@
 .pragma library
 
+function lint(a, b, t) {
+    return (1 - t) * a + (t) * b;
+}
 function mix(c1, c2, alpha){
     return Qt.rgba(c1.r * alpha + c2.r * (1-alpha),
                    c1.g * alpha + c2.g * (1-alpha),