EC of the solution: 800 ppm. I changed the tent 120*120 for 120*240, and also changed control tank from 20l to 70l to avoid pH fluctuations. When cleaning the system I broke the pH electrode – what a shame! So I have to check pH level manually, no automation at all)) plants started to absorb less solution, that’s why a grained 1/3 of the solution and added pure water, decreasing ppm to 700.