Hi all, Ive doing alot if research, and reading alot of the awsome threads On this forumn. You guys are doing some truly amazing stuff! Here what I got going on: 4x4x8 grow tent 400 watt MH for veg. 400 watt hps for flower 6" air cooled light hood 4" inline fan 4" air scrubber 18 gal DIY closed dwc res (4 site) 5" net pots Oscillating fan 24 hr timer I will be chnging out the 4" fan to a 6" inline fan today And I am changing out the air cooled hood to a 6" cooltube Today also. My biggest concern right now is temps. I added a 46"x46" Sheet metal Drain pan, which takes up the whole floor of my tent, ive heard that foil Can cause heat issues. Will sheet metal Have the same issues as foil? I've been running my 400 watt my and a couple of cfl's as a test run And the temps seem to be running around 80 to 86 degrees I understand That this is a little hotter than optimal. Is the sheet metal going to be a problem? And will the 6" fan and cool tube bring the temps down? I will post some pics soon. Thanks in advance for any and all input! Skank