I was actually thinking of doing the DWC setup, using the tub as the reservoir. What do you guys use to keep your plants aflot? The write up that I read says to use styrofoam but Im not sure if that will work very well. Plus it will be awfull hard to find a piece of styrofoam big enough for my tub, its one of those big oval shaped tubs with full wall mirrors around it. Anyone have any ideas on how to go about this? Should I just make a reservoir and set it in the tub? Just looking for some more ideas. Heres the link to the write ups I have found on different systems just so you know what im looking at. Simply Hydroponics - System types
Thanks