IM AUQA Gadget – High Tide Water Riser – DesktopThe High Tide Water Riser will only work on Fusion Pro 2 aquariums, with the integrated emergency overflow. This new feature will allow you to adjust your water level height in your display portion of the aquarium. Simply attach it to your overflow and slide it up or down to the preferred height.1 High Tide Riser per purchase.Fits Desktop Fusion Pro 2 – 10, 14, 15, 20P (1 is required).Fits Desktop Fusion Pro 2 – 20, 25 Lagoon (2 is required for each overflow).