So I'm going hydro for the first time. Building a 4by8 flood table. No problems building the table. Just wondering what to sit my pots on so the roots grow out the bottom. Or it ok for them to just grow out the sides? And is it ok to have the table uncovered or should I cover the table as I grow and cut a plastic cover around the stems and table. Anything would be helpful. This is my first post and I'd have to say everything on this forum has been awesome !!