Hey there SC ! This is one of those tough questions because it's lockout, so you have deficiency symptoms even though there is noclear reason why this should be the case. Basically a lot of these products have "hidden" N, meaning a small quantity of N in fix mix, calmag etc... + NPK that means that over time this can cause lock out. Basically it's partly the fault of genetics for being so sensitive and partly the nutes . Just cut some N out wherever you can it should bounce back a bit slowly but it will recover. Hope this helps ! 🚀