netpots

Are these 10" netpots too big to only grow 1 plant per 5 gallon bucket (DWC)? Also if said pots aren't too big, will a 1.5" rockwool cube be big enough? Any help would be greatly appreciated.

I have a 2x2x6 grow tent with a 400w led light I want to build a DWC hydroponic setup I want to use a black storage tub but not sure what size gallon tub to buy for that small of a grow 7 gallon 10 gallon 20 gallon ? how many plants should I put in whatever tub I decide to get I will be only...