Picked this unit up cheap at a garage sale. I am new to hydro but i have been playing around with a couple DWC setups but not an ebb in flow. What I don't understand is how large will the plants get in the small pots that it comes with I don't understand where the roots would expand to. There just doesn't seem like much room at all for root growth so I am thinking that the plants will stay small. Hopefully someone can elaborate on this setup for me.