Leaf tips turning yellow "pix"

I did look through the search feature and I think its nute def? IM 1 week into flower useing miracle grow soil so I haven't added any nutes water ph and soil ph is at 6.5. Watering only once every 3 days. Thanks for any help. Ive also already had mag def. but added epsom salt few weeks back and they looking much better a few days after that.

wow that plant with the skinny leaves looks really cool!!

it could be very slight nute burn? did you recently change the soil? or is it time release? doesnt look too bad, but watch if it gets worse

Ya its in the time release soil but plants were flushed almost a month ago. Because I thought the mag. def was nute burn.