When I said "what" I meant as in what brand is it that you feed.....I don't EC or PPM,,,,,it's a waste of my time....
I use the NPK value of what I feed to determine "what" to feed and determine "when", by how old the plant is in weeks. Some times I sikply look at them and they "tell" me what they want......THAT has come from grow a long,long time.
I'll bet your in flower and if so it's P tox from High P bloom feeds to early......So "theexpress" posting is part of what I would have said.....Problem is, if your in bloom, extra N is not going to do much at first.....Gotta get the P down. Water with VERY low to 0 P feed for a week and skip ANY higher P nutrient for you till week 6 of bloom.