Ok I see that with the 1000 watter in a 5x5 your putting a lot of light on those babies. the way they are drooping and look like they are kinda tired.
they may be getting too much light. the leaves should be reaching up some. and the way they are bunched up some...no stretch between nodes. they are getting a lot of growth on them. Not a bad thing...lol
they look green and healthy in a sence. but in that small space they will need a lot of fresh air. and I would say start nutes, but lightly at first.
can you raise light any higher? or does it dim?
As with the exhaust fan, in a tent... Are you using a carbon scrubber? You should pull air out instead of push. pulling through ducting will pull all air through filter.
If you push air through, it will leak out through any small holes. if there is a problem with smells...if not and your happy with it and its working...no worries.
Are you going to go to larger pots? or flower in those? Some pruning and lst right now wouldn't hurt, take some more clones?
they have a lot of tight nodes and looks like many branching, so when you go to flower they will double maybe triple in size...so beware...mmwahahaha!
burn a biggun...
