any reason you bought transparent tubs? i would paint them black if i were you otherwise you'll have a blue glowing box that won't provide any type of dark period. my dr40 tent w/ 8 cfl's and 120mm pc fan sat at 70-75 degrees all day. i'd also add like 4 more cfl's too and a passive intake on...
just chopped my first plant about a week ago. unknown seed, grown dwc in a secret jardin dr40 under 8 42w cfl's using advanced nutrients, final weight was a little under 2 oz. used the popcorn buds and trim and made some prime time honey oil ..... enjoy bongsmilie
i have the intake and exhaust for the hood completely seperated, and my hood is sealed with a glass pain. so the smell doesn't come out. i have a scrubber attached to another fan that cleans the air in the tent, plus some ona blocks so it smells pretty fresh.
im gonna get a dr150 later today. i have a hydrofarm hood with 6" vents and a 6" vortex fan. im also running a 1000w hps and digital ballast. i have no cooling problems at all in my closet which is smaller than the dr150. so you shouldn't have any probs with heat.
i use 1" rockwool cubes to root clones in then i stick the whole cube in a 5" net basket and cover with hydroton. then stick them in my bubbler. never had any problems. in dwc the air supply for the roots comes from the airstones used in the res.
i'm not worried about it at all. the hydro shop is a block away and i have a pepper garden and some corn growing as well. plus my plants are in a secret jardin so im not worried about the heat guns and wat not.