On those Hydro huts I thought that they came with a 6" duct for fans? Also, I thought most air cooled 1000w's also cam with 6" flanges. I think that your 4" might work, but I think that it is a big might. Just be ready to have a back up plan.
Maybe try this, use the fan/scrubber on the grow chamber it self, because you need to focus that scrubber on the chamber because of smell and of coarse heat, and then get a $75 Squirrel cage fan for the hood of your light.
The bucket idea is pretty good. Just remember the bigger those plants get, the harder it will be to swich them out to a new res.
Good luck
Adieu
BlueBear Reviewed by BlueBear on . Ducky's Setup Hey everyone heres my setup I have been gathering over the course of 2 years and some lucky hits in the lottery. I have a Hydrohut deluxe for the main base of growing which Im planning on splitting in half by putting some white Visqueen dead center from the zipper all the way to the other side. There will be two 7gal waterfarm buckets running independantly sharing a small air pump on the veg side which will 2 plants will inhabit each bucket for vegging and to be mothers. The flowering side will Rating: 5