Hi i was using ferro coco a and b and had what looks to be mag def. I was feeding at 1.2 ec with a tap water backround of 0.7-0.8 ph at 5.8 So as they were going patchy i changed nutes to dutch pro 0.8ml a ltr bringing me to 1ec. They are doing alot better now as you can see in pics the patchy leafs are from the old ferro nutes i changed from but im trying to figure were i went wrong as i like the idead of the nutes being tailer made to my tap water. Ferro suggest on there chart to ph at 5.5 so could this of been were i went wrong. Does Anyone here have any experience with ferro? I may sling this grow up as a diary i am still a noob though lol only doing 8 plants for personal use as im sick of paying so much for it Cheers Sent from my SM-G950F using Tapatalk