Pre-99 big bud nivarna seeds

I'm adding this a day before due to it being Christmas day tomorrow It's been a quite week no dramas to speak of Topped the tall one to help the others catch up so I've got a more uniform canapy As you can see they have grown some but not as big as I'd like them to be for 5wks old . Not sure if it's the fact I'm having to heat cabinet or that b'cuzz just isn't that good . They do look a.nice shade of green I must say but they upward growth isn't the same as when on canna . I realised after the unicorn poop I'm growing had the leaf problems one of these has the same and them two ware the closest to the fan so I'm assuming it's from that being too strong and not notes burn. Any ways peace out