sorry tried pics be cant do it . as far as the co2 I have the regulater that goes on the tank I have the co2 tank and a control panel that controls heat humidity /co2 very pricey but anyway iam not sure if iam just going to put co2 on a timer to rlease it when I what ?? no sure other equipement in room is a sulfhuf burner a charcoal scrubber 2 600 what hps / ac unit 3in 1 / 20 gallon res with pump for feed to drain system / 24,7 ph/ppm/temp monitor cogo nutes // fans etc I use flock wool in one gallon pots with stone on bottom and top for algee.......green lights etc I grow around 25 plants per grow I have a license for 42 plants my room is 8x8x8 ..when and how much should I use co2 ????sorry about the spelling typing fast