Red Sea.
If your tank has eurobracing, you need a couple of inches between the bottom of the bracing and your water level since the top of the wavebox has to be out of the water for air intake. Therefore, you want your overflows designed so your water level will be low enough to allow the top of the wavebox to remain above the water's surface during a wave crest. This is only a problem when your mounting the box under bracing though!!