Nah all you guys have been a great help.
I'm not trying to start some lame flame war in this thread, just get ideas on best way to remove run-off because well i'm lazy and disabled so limited ability to haul water downstairs from the 2nd floor i'm on.
PS: I have grown weed (successfully) before, I am just trying to get ideas because the members on these forums provide a wealth of ideas that I wouldn't have thought of myself.
And yes coco retains an insane amount of water, took many liters to re-hydrate the brick of Canna coco, impressive stuff coco is.