Well I got all my fittings ordered from US Plastics and the length of PVC already here. I'm having real trouble finding the planking though. Home Depot here doesn't have anything like that, and the other big box stores the closest is composite decking, which I have no idea how it would hold up to chlorine.

Do you have a link to the HD Us website for this material?

Mine should be an easier shape, a 3'x10' rectangle, but I'm including rails around it save for the steps in, and a 2' section to go into the pool. That should keep our daughter from accidentally stepping off. Should be fun to see how it turns out.

Any ideas on weighing it down without rocks? I thought about not drilling the PVC out so I could fill the legs with sand, but that would most likely make it too heavy to ever get out.