yeah there is a chance that is whats happenening here.. how long ago did you start nutes? when did the yellowing start and browning start??? ill tell you what mg soil is nuted pretty well but if your problems started recently then its not that. unless you have been battling for awhile. But yeah flushing should help if it gets worse check ph n hit it with nutes and super thrive. super thrive will buy you more time to experiment and test the waters. Super thrive really does do wonders man and its under 10 euros