The plant have too much crystals all go ok i haven't problems on leaves or other problems all its ok i have more fresh air on room and everything go well...
I have the exhaust,filter and intake from my old setup 70x70 and now next step is go for new bigger air recycling system ...!
The plant looks very good, but you have a small problem with your " grow area ", it must not be very good to recirculate stale air.... look for a solution before full flowering.
Good luck!π±ππ½
HGβοΈπ½