Why do leaves' tips go brown

[Ravski]

This is my first grow just asking why leaves tips go brown

 

[Booja]

Based on my experience (limited) I'd guess nutrient burn.

 

[webeblzr]

Without seeing the whole plant, my first reaction would be a touch of nute burn.

 

[Ravski]

It's only minute mainly tips slight brown but plants look healthy