Deformed growth? Help needed please

[Purea]

I usually have vigorous growth but this time I don't notice them moving as much
I've been feeding with the future harvest nutrient line, also added great white, microbe instant teas and my coco medium is loaded with charge (worm castings, bone meal...)
All as usual
PH IS 5.8/6
E.C 0.8/1

it looks like tip burn but at 1 ec it shouldn't be so
Even the colours off I usually get a richer more vibrant organic green to the leaves

 

[Trixie]

Your pH may have got a little low in the growing medium for that shoot. You can have a low EC with a low pH and burn the tips because of the low pH. Catch some of the run-off on a watering day and test the pH.

Keep it steady because the plant is probably adapting and getting used to the growing environment. She will pull through and come out on the top if you are patient.