C02 help needed

i finally have all the parts i need for my c02 setup. i just have a few questions though.
-i just got in the mail my ppm controller and monitor. it says to mount it on the wall at "plant hieght" how high up the wall should i mount it to get the most accurate reading? (i posted a few pics of my room to kinda show the walls)

-also i for now just have the c02 hose running off the back of my light just until the rest of the system is set up. where should i move this hose to so i can get the best c02 dispersal? should i mount it to the fan blowing across my plants? if not where would be a good spot.

Thanks for the help!

Plants use co2 all the time but the plant you have are to small to need that much co2 your just wasting co2 as long as you bring in fresh air the plant won't need that co2 yet. Save the co2 for when you flower thats when its counts. Good luck

use velcro tape. Place a long strip on the wall vertically and a small opposing piece on the back of the PPm controller. You can easily adjust to match canopy.

suggestion, get a shelf in there and get plants off of floor. They'll appreciate it in the winter. And cover the floor with newspaper and a painters tarp. carpet fibers in bud aren't fun.

thanks serapis, but how far up the wall should i put the ppm monitor? should it always be at the canopy or at the same level as the top of the plants? and also where should i put the hose that the c02 comes out of?

so do i need to always keep the monitor/controller at the same height that the plants are and keep raising it the taller the plants get?
i also zipped tied the c02 line to the front of my rotating fan, this should get the c02 well spread around my room right?

any help would greatly be appreciated!