I finally got around to joining RIU...been reading your forum through google searches in the past. Looking forward to finding my way around. I'm a hydro gardener running a modified bucket (KBS) system. Peace out.
The official name you want to search for is "black and white poly plastic" It is also unofficially called panda plastic but I don't think you'll find it listed by retailers as panda. I have only ever bought it from the hydro store, not the hardware store, so I hope you have a local hydro...