Nirvana bubblelicious flowering problem help appreciated

about 3 and a half weeks into flowering 5 bubblelicious.. only one seems to be showing the problem, they all get pretty much the same treatment..grown in ffof and roots organics mix using fox farm gb bb tb and cal mag. ph is 6.4-6.7 ppm 1000-1200ish.. no grow big last couple waterings but i have been feeding with the other stuff every watering gradually working up the ppms. any help appreciated

Looks like nute burn, growing the same strain and some pheno's need less food than others, some love high ec others dont want anything over 1.2ec.

I might be wrong, but hopefully someone would confirm, best thing to do, is to flush the medium and wait a couple of days to see what happens.

Good luck, peace to all, happy growing.

youv'e said it's on soil, didn't you?
are they different seeds or clones of same mother plant? is the problem is equal all over tha plant or just on the top? did u check under the leaves for

Bubblicious is that supposed to have two pheno. One has a big fan leaves and taste like grape and doesn't yield very much. the other looks like a 5050 mix sativa and idica and tastes like gum and yields alot. Im growing both right now yours looks like the grape pheno