im using botaincare pureblend progrow 3-2-4 and im at 400 ppm with ph at 5.8…and yes i def think im over feeding them,im flushing tommorow and when i go back to nutes im gonna try 150-200 ppm…thanks for all the imput,this is my first grow and im super worried about killing them,ive read every post in the infirmary,ive read so much over the past few months that i should be a pro lol,the burn is on madonna f1s,i have strawberry diesel on the same table and they look great,the other table has bubba kushxdeep chunk and they look great,only ones showing burn are the madonna f1s so i figure they cant handle as much nutes…ill keep ya posted after i get them better…thanks again