PLUMBING HELP

Hi everyone, i am in need of some help. I am setting up a 6 pot set up in a 4 x 3 x 3 room. I have all the equipment needed but my teacher has gone away for a while so im left to finish off what was started. Can someone please tell me or post a diagram of how to set up the watering system. A silly question i know but its the one thing left for me to learn as everything else is in place. I believe its called a recycle system that will be in place with 1 x 205lt container and 1 smaller 50lt container. I know the amounts of juice etc to add to the water i just dont know where all these hoses and pipes go so a diagram would be awesome. Also i have heard 2 ways of thinking re a carbon filter, 1 says to be in the room for the air to go into before it goes thru ducts outside the other says for it to be on the outside of the room so the air is comming out of it. Is there any difference or is one better than the other. Any help is very much apprieciated, so thank you in advance.

Cheers Flowerpot Ink.