As I have alluded to, I made this PVC shelving. I once saw PVC shelves being used in a greenhouse. It looked like a great idea because I wanted something that was transparent so that shelving space that isn't in use does not end up blocking light. I also wanted it to be cheap and as a bonus I got all of that and it's super light weight and custom. Here is the PVC shelving. I'm going to eventually extend it so it is twice as long. Must have only been about $10 for the whole thing. I went with the 3/4" PVC to save on money and it is plenty of sturdy.
