Yeah it's rubbermaid 21 gallon 79.5 liters.So just keep the veg time down pretty much? I just figured that people grow a single plant in the 5 gallon bucket.So I'm thinking two plants could fit in a 21 gallon tub? I just hope they don't go rootbound

I just hope the yield will be more than just a single plant in the tub alone.If two will cause yield to go down,I will stick with a single plant system.I have decided to run both and see the results.......