Just switched from soil to DWC

So I've grown in soil lots because for some reason I thought it was better. I have recently pulled my head out of my ass and realized the stupidity in that so I'm doing my first DWC. I also have switched from a closet to a grow tent. Well I thought I ordered one that was 6 ft but instead it's 4 1/2" so right away I have some obvious height issues, any suggestions on how to keep the height down, I was thinking about using small totes. What's the smallest I can go?

I grow sativa in a 80x80x160, with plenty of head room, just flower in 3 litre pots and do so when there tiny.