superskunk61
New Member
Re: 4 plants/3 strains, Promix HP, 600W MH/HPS
might be nitrogen,i had same problem,mine was potassium/magnesium.did it start with brown spots 2 yellow,checvk ph.but looks like phosphorous to me,u need to get a test kit for ur medium that checks n-p-k separately how much ur medium contains those nutes,if its not n-p-k go from there my guess is phosphorous or nitrogen,not 100% sure,r u using coco,if so it can b magnesium to.process of elimination.not hard but teadious.hope I could help.mine was phosphorous.peace.ss61
might be nitrogen,i had same problem,mine was potassium/magnesium.did it start with brown spots 2 yellow,checvk ph.but looks like phosphorous to me,u need to get a test kit for ur medium that checks n-p-k separately how much ur medium contains those nutes,if its not n-p-k go from there my guess is phosphorous or nitrogen,not 100% sure,r u using coco,if so it can b magnesium to.process of elimination.not hard but teadious.hope I could help.mine was phosphorous.peace.ss61