looking dam fine my man ! i remember my first grow in the tent ( exciting ) my only coment for ya wud be to spend ya money on hps lighting instead of c02 coz for one it can be dangerous if u dont no what ur doing n second the return ( bud wise ) from using t5s to hps is gonna be a lot ! i av a similar tent to you n they are gr8 for growing ! i have not used t5s but i no a lot of peeps use them as there ok to control the heat but soon enough u will av smell problems , do u av a extractor fan n filter ? if u av then going with hps for bigger yields will be ok coz u can extract the heat through fan n filter ! of course ur gonna stick with t5s for now but if ur serious about bigger yields then hps is the way to go in the future for ur good self,, under 600watt hps i can veg a plant in 4 weeks getting close to a inch a day once out of small pot ! so 4 weeks veg n 8 weeks flower and good results also, heres a pic of a skunk#1 feminised seed from sensi seeds its there cheapest seed, chech it out !
anyhow man grow on good look coz ur doin just fine ! peace out !