ak47 5 weeks into flowering

this is my first grow and prolly got about 2-3 weeks left. under a single 400 watt lamp started co2 enrichment at 2 weeks into flowering. Any feedback would be nice. also wondering how u guys set up your co2 because ima redo it next grow; just set this up real quick and getting a 600 to run with the 400 next cycle.

Lookin good im curious what your final yield will be.

How are you doin your c02? Just have the tank/regulator hooked up to a timer?
You can get c02 controllers but they are very expensive(for the ones that read ur ppm in the room)
there are many envinormental controllers out there that will make sure ur tank isnt on when the lights are off but they arnt as acurate

on a timer. im planning on getting a co2 controller after i get a few grows under my belt no need for big time investing just yet. yea anything over 3 zips dried and i will be a happy camper!

still looking on suggestions on a new co2 setup. i dont want the duck tape and bamboo holding up the tubing. and i have a feeling there is a better way then stabbing holes in the tube. mabye there is an adaptor that can disperse the co2 better or if people just make the output behind a circulation fan.