Pool trends | Knife-Edge Pools: For a slightly more upscale design give a mirrored appearance to your pool by having the water level match the pool deck level. The water flows into a slot-edge around the pool to keep it from overflowing. These pools may require a slightly more complex set-up, but it is a beautiful design that will impress everybody. #knifeedgepools #pooltrends #vanishingedgepool