Is that Mn deficiency?

[Gilmour]

Hello guys, a few days ago i saw that on 5 6 old leaves of the plant.
It looks like Mn deficiency for me but I'm not sure.
I'm on late veg state, 65% of humidity, 30 celsius degrees.
Growing on soil.

What do you think? Thanks

 

[Creeperpark]

No its not. I see you are having problems with your soil holding water evenly. Maybe too wet or too dry I don't know which? You need to monitor the soil closely and watch the water intake now that its cooler temps.

 

[Creeperpark]

Underwatering, overwatering and lack of humidity can cause dry brown spots, especially along the edges of leaves or on leaf tips. Solution: Stick a finger in the soil. If it feels bone dry, you're probably underwatering. If it feels soggy, you're likely overwatering. Google