After many researching i discovered the real problem of Somango leaves. They received big wind stress from fan, cuz i checked ph and ppm of soil and water which comes out of pot when i made a flush with pure water with good ph. Ppm was 800 and ph 7.0. And also leaves received stress from bug humidity during night, when lights were boff and the humidity making machine was working. That was a mistake to keep it working when lights were off.