Control Temp Range

Hello everyone.
I have 4 tanks that need to control temperature.
The maximum temperature ranges vary according to the process.
When the Tank Temp goes to the limit, cooling is ON. So this is setting up on Arduino Sketch
In my Blynk project I use a “Value Display” widget to see the Tank Temp.
How can I send the Max Temp. set in “Value Display” widget on Blynk to Arduino?

Thanks for your time and answering.
Best regards.