I am a trained metalworker and have been working as an assembly technician for 1 1/2 years and assemble revolving doors, standard doors and sliding doors. I ensure the automation and security of buildings. Most often these are schools, high schools, police stations, hospitals, children places, research centers and hotels. I had a 1000 liter seawater aquarium running from 2018-2022. This was kept alive with over 170 Blockly controls. Because I built the entire control boxes myself and it's a hobby of mine and from another forum I had a professional help me program the controls. But since I can't really understand blockly, I'm currently converting to node-red. because I understand this better. But I'm still at the beginning and still have a lot to learn. Now I've an 110 Liter Fresh Water Tang.