Manganese deficiency?

[AgroMarciano]

Hello fellow farmers,

Today is day 56 of my Moby Dick XXL Autoflowering and buds are looking nice but these brown leaves and spots are really worring me...

I haven't found them in older leaves, only in the new ones... Thats why I believe these could be a Manganese deficiency...
I haven't notice a prominent stunt in her growth either... but i'm not 100% sure about that...

What do you guys think??

Cheers!

 

[AgroMarciano]

What Strain is it? Moby Dick XXL Auto Dinafem
Is it Indica, Sativa or Hybrid? What percentages? Mostly Sativa
How Many Plants? 1
Is it in Vegetative or Flowering Stage? Flower stage, day 57
Indoor or Outdoor? Indoor
Soil or Hydro? Soil
If Soil... What is in your Mix? Light Mix BioBizz
If Soil... What Size Pot? 11 lt Kasvi Pots
Size (Wattage) of Light? How Many? 270w Led
Temperature of Room/Cabinet? 27-29 C / 80-84 F
RH of Room/Cabinet? 25-30%
PH of Medium or Reservoir? 6,3
Any Pests? Not that I know of
How Often are you Watering? Every 3 days
Type and Strength of Fertilizers used? Atami Terra Max + Atami Atazyme + Bloombastic + Delta 9
Size or Square Footage of Room? 40x40 cm