m0useanswered grow question 3 years ago If you have the room go bigger.
I'm running 3gal pots in 2x4 tent and it could do 2x 5gal just fine.
so a 8x4 I would do all 5gal.
Only downside is its a bit more pricey as more nutrients and medium is used, but almost always the bigger the pot the bigger the yield.
Best Of Luck!