diff --git a/gui/main.py b/gui/main.py
index f7bfbf3..94fc3cc 100644
--- a/gui/main.py
+++ b/gui/main.py
@@ -244,11 +244,11 @@ class PHControllerGUI(QMainWindow):
         if ph == 4:
             self.send_command("<15>")  # Start pH4 calibration
             QMessageBox.information(self, "Kalibrierung", 
-                                   "pH4 Kalibrierung gestartet. Sensor in pH4-Lösung tauchen und warten bis der Wert stabil ist.")
+                                   "pH4 Kalibrierung gestartet. Sensor in pH4.01-Lösung tauchen und warten bis der Wert stabil ist.")
         else:
             self.send_command("<16>")  # Start pH7 calibration
             QMessageBox.information(self, "Kalibrierung", 
-                                   "pH7 Kalibrierung gestartet. Sensor in pH7-Lösung tauchen und warten bis der Wert stabil ist.")
+                                   "pH7 Kalibrierung gestartet. Sensor in pH6.86-Lösung tauchen und warten bis der Wert stabil ist.")
     
     def start_auto_dose(self):
         volume = self.volume_spin.value()
diff --git a/ph_controller/ph_controller.ino b/ph_controller/ph_controller.ino
index da6e0c7..65ade39 100644
--- a/ph_controller/ph_controller.ino
+++ b/ph_controller/ph_controller.ino
@@ -213,24 +213,7 @@ void loop(){
  for (int i = 0 ; i < 4 ; i++) {
     RxCmd[i] = 0;
   }
-/*
-  if (Serial.available()) {
-   delay(2);
-    RxCmd[0] = Serial.read(); 
-    if (RxCmd[0] == STX) {
-        int i =1;
-      while(Serial.available()) {
-        delay(1);
-        RxCmd[i] = Serial.read();
-        //if (RxCmd[i]>127 || i>7)      break;                                    //Communication error
-        if (RxCmd[i]==ETX) {
-          break;                                                                  //Read all data 
-        }
-        i++;
-      }
-    }
-  }
-*/
+
 if (Serial.available()) {
    delay(2);
     RxCmd[0] = Serial.read(); 
@@ -264,16 +247,6 @@ if ( RxCmd[1] == '1' ){
           Pumpe=1;
       break;
     }
-    //case '3':{ // Schlauchdaten anfordern
-      //Serial.print('<');
-      //Serial.print('#');
-      //double mlpersec =( ml[tubid]*korrf*2)/6;          // tube * 20 Um/min * korecturfaktor durch 60 sec
-      //mlpersec = mlpersec*100000;
-      //Serial.print(mlpersec);                          // 
-     
-      //Serial.println('>');      
-      //break;
-   // }
      case '3': {
       Serial.print("<T");
       Serial.print(tubid); // Return current Tubid  
@@ -320,7 +293,15 @@ if ( RxCmd[1] == '1' ){
           }
       break;
     }
-    
+    case '8':{ // Schlauchdaten anfordern
+      Serial.print('<');
+      Serial.print('#');
+      double mlpersec =( ml[tubid]*korrf*2)/6;          // tube * 20 Um/min * korecturfaktor durch 60 sec
+      mlpersec = mlpersec*100000;
+      Serial.print(mlpersec);                          //      
+      Serial.println('>');      
+      break;
+    }
     
   }
 
@@ -572,89 +553,6 @@ if (CurrentMode == 12) { // Auto modus stopped
       }
     }
    }
-//  if (adc_key_prev != lcd_key)
-//   {
-//   //Serial.println("Key Press Change Detected");
-//   switch (lcd_key){               // depending on which button was pushed, we perform an action
-//       case btnRIGHT:{             //  push button "RIGHT" and show the word on the screen
-//            //lcd.print("RIGHT");
-//            if ( CurrentMode == 0 ){
-//               lcd.clear();
-//               CurrentMode = 2;
-//             }
-//            if ( CurrentMode == 3){
-//               lcd.clear();
-//               if ( CalSelect == 0 ){
-//                 CurrentMode = 4;
-//               } 
-//               if ( CalSelect == 1){
-//                 CurrentMode = 5;
-//               }
-//            }
-//            break;
-//       }
-//       case btnLEFT:{
-//             //lcd.print("LEFT "); //  push button "LEFT" and show the word on the screen
-//             if ( CurrentMode == 2 ){
-//               lcd.clear();
-//               CurrentMode = 0;
-//             }
-//             if ( CurrentMode == 3 ){
-//               lcd.clear();
-//               CurrentMode = 0;
-//             }
-//             if ( CurrentMode == 4 || CurrentMode == 5 ){
-//               lcd.clear();
-//               CurrentMode = 3;
-//             }
-//
-//             break;
-//       }    
-//       case btnUP:{
-//             //lcd.print("UP   ");  //  push button "UP" and show the word on the screen
-//             if ( CurrentMode == 0 ){
-//               lcd.clear();
-//               CurrentMode = 1;
-//             }
-//             if ( CurrentMode == 3 ){
-//               lcd.clear();
-//               CalSelect = 0;
-//             }
-//             break;
-//       }
-//       case btnDOWN:{
-//             //lcd.print("DOWN ");  //  push button "DOWN" and show the word on the screen
-//             if ( CurrentMode == 1){
-//               lcd.clear();
-//               CurrentMode = 0;
-//             }
-//             if ( CurrentMode == 3 ){
-//               lcd.clear();
-//               CalSelect = 1;
-//             }
-//             break;
-//       }
-//       case btnSELECT:{
-//             //lcd.print("SEL. ");  //  push button "SELECT" and show the word on the screen
-//             if ( CurrentMode == 0 ){
-//               lcd.clear();
-//               CurrentMode = 3;
-//               break;
-//             }
-//             if ( CurrentMode == 3 ){
-//               lcd.clear();
-//               CurrentMode = 0;
-//               break;
-//             }
-//               break;
-//
-//       }
-//       case btnNONE:{
-//             //lcd.print("NONE ");  //  No action  will show "None" on the screen
-//             break;
-//       }
-//     }
-//   }
 
 }