to me it looks more like a lightburn
are your lights running on 100 percent? in that distance? if yes... less is more
and plants look thirsty too
good watering routines make your life much easier
@GreenBuzzNutrients, it's too much nutrients (3week of calendar) i watered them with only 1/2 and they like it , light is at 35% actually , canna soil is different than biobizz than I used I'm not familiar with but it's ok i learn very fast ๐