Hi i am first time grower doing autoflower heavyweight vast fast its 52 days old and having some trouble. Some lower leaves went yellow and some going light green I am using organic compost, and been adding Vitalink max earth 24ml per 1.5ltr 1760ppm is measurement of feed water, not sure on soil ph tester arriving tomorrow. But from pics can u guys give me Your opinion on what u think is wrong thanks