Containing one plant inside a big orange water cooler will not be possible, or your plant would have to be so small that it would not be worth growing. Usually, the roots hang down into the bucket from the lid, and the roots grow in that space. If you run out of root space, your plant suffers severely.

I'm a DWC n00b myself but I know that you can't put the plant down inside the water cooler; it will have to grow out of the lid. If you have to be stealthy about it (ie. enclosing the plant in a really small space), then I would say it wouldn't be worth trying to grow anything. Not to crush your hopes, but the 12 weeks going into one plant and yielding a few grams just isn't worth the time and effort its going to take.

Why is it that it has to be so stealth? You aren't trying to grow in your parents house or without your roommates' consent are you? :wtf: Realize that should you ever be busted, everyone in the house will be charged! Grow smart!