The 4th day of the mode 12/12 (1.6ЕС, РН 5.8 )
Few details about watering ... Mix a solution of EC 1.6 pH 5.8. After the solution was pumped back into the tank, I measured parameters again. If EC is 1.6 and pH is 5.9 everything is normal, it is not necessary to raise the concentration of the solution.