Желтеют листья на цветении

coming from bottom of plant? probably N-def coming from top? often times this is due to ppl bossing P and or K too much in bloom. should also see thin blades at top if so. can't really see your plants well enough under those grow lights and the images given. Okay, looked at your diary.. why did you use these pictures? they are useless by comparison. It isn't even yellow in the normal pictures, lol. if you are following common instructions from fertilizer manufacturer. light interveinal chlorosis up top with thin blads. also some necrotic spots. I'm still leanding toward too high P or K, with the interveinal deadspots spots i'd go with K-tox. "At the 47th day, he added 300 milligrams/per 1 liter of succinic acid water and poured 1 liter per girl" - from diary.. did you make sure this did not through off pH balance of your substrate? not everything they suggest should be done. keep tweaking those ratios until you get a formula that works smoothly. i've never been a fan of their ratios. weighted average near 8-8-15 and EC of 1,3 to 1,5 is a good range to start (that overall concentration includes Ca, Mg and S too)