i have seven plants 4 sensi star 3silver haze. started flowering about two weeks now. the lower leves are yellowing and srivel and and dry out halve of the leves have fallen of.and its ha pening in a day by day basis. i flushed them out a week ago. will have some pictures up soon . also what ph level do u pay atenion to the soil or the water/fer? plese help!!!!