i have a 4x4x7 tent being set up with 2 ds200's(wanna upgrade to the 300's), 4 inch vortex fan with phresh carbon filter..plan on doing a 10 plant(maybe autos) 3gal geo pot grow..wondering if its necessary to have c02 running during veg or is it more for flowering time??if it can wait, thats better on the budget..also, found a couple cheap dehumids on lowes that hold 5 pints of water, some less..would a 100$ one be necessary or could i just use one of the smaller ones for what im doing