i mentioned it because when problem arrive ,always go back to simple,those are good looking clones,a few didnt like what you feed,so by taking those 2 ppm down say 100 ppm you might have better luck,that could also go other way as in rising them 2 for more,ive had plants that were hogs,especailly the blue dream feed hogs,they could take manufacture suggestion and then some,then ive had some that never got to 1/4 strength,i got about 4 strains that take nothing but water,every time i try to feed them nutrient other than the soil,they shit down my neck.im not saying your inexperienced or any thing that way,imjust sayine drop or rise the feed by ppm instead of quarters if you dig what im saying,1/4 strength of on line might be difrent with another line,so dont give up mix and fix by ppm not suggested feed schedule chart,ph is most important,working by ppm or ec is the way to go,who knows you could have got 2 week old product or 5 yr on the shelf products,you feel me,sorry about thinking you were new,after i comment check to see if you were another joker that jions the farm and gets questions answered and then you never see um again,never seen you ,hang around more often,share some your stories and methods,always need helping hands in the human factor,fresh ideas what keep all going,sorry if i interfered