Hi, first off, looking good
20 lb bottle of co2 in 5 days, that's a little too much in my eyes
and the changing in light cycle will not cause too much stress, but, like every other sudden change in environment, it will delay the plant's growth just a tiny little ientsywientsy bit. so don't worry
ow yea, MJ plants are NOT bitches lol just kidding call 'em how you want