You say its in the closet hope you get a good hood that can be vented when you get the 400,just my 2 cents.Nice little setup good job!!!Those clamps will rust over time and could be a problem,might mess with your PH i dont know tho just trying to help you before Problem happens.Would a plastic zip tie not work i have used those the bigones i own a a/c company and have a band gun that really tightens the bands but, You can use pliers.Im gonna try and make 1 like yours but use misters,thanks for all the advise on the stuff.And GL with the grow!!! Welcome to RIU.