You are a smart man, I also thought about the metal clamps rusting but figured it wouldnt be an issue until they get bigger. Once the plants reach a certain size the sprayers could get blocked by the extra root growth. so then im gonna make a new spray setup that goes around the roots not right under. You live and you learn. You could use any setup really thats why this system is fun to make! Thanks for the advice on ventilation. Im gonna just get a floor fan and put it right in front of em once the new light gets here!How smelly do things things really get guys? Like could you smell then outside an apartmet? Im wondering if i should invest in an carbon scrubber