looking great so far man. Very healthy indeed. no problems.
I recommend a carbon filter, 120mm should be enough but some people prefer 140's and 200's.
I have 3 skunk plants and there is 0 smell leaving the room, considering we're in full bloom week 5 i'd recommend getting one, they are worth the money.
If your a MMJ grower it's a said, you don't want thugs breaking your door down for an oz of weed.
Peace,
Denial