Once the pole is inside of the pocket the waterbed sheet corner is much easier to handle and put down underneath the waterbed mattress. Since the pole keeps the pocket fully open the waterbed mattress easily fills the pocket. The pole wedges itself in the frame corner and the weight of the waterbed mattress keeps it tucked! Jul 25, 2010 · Need a fitted sheet? Here’s how to turn a flat sheet into a fitted sheet to beef up your bedding stash. We are very hard on fitted sheets around these parts. It’s likely a combination of all the playing, sleeping, wrassling, and, yes, jumping that gets done on top of them every day, the result ... I've never done this but I have some ideas. I think that if you remove the water bed "mattress" you can then lay slats of wood across the width of the bed with no spaces between the slats and then lay a traditional mattress on the slats without a box spring. Next I would try to remove the canopy and the two posts at the foot of the bed. May 28, 2010 · http://egyptiancottonsheetsets.org - Egyptian cotton sheet sets, pure cotton super soft, pick your thread count, waterbed sheet sets and even king size waterbed sheets.