Position the Reef Diaper flange with the relief cut located at the back of the tray and the logo located at the front of the tray as shown
Tip: The Red Sea filter trays have very sharp edges on some of the filter sock bores. These sharp edges should be removed from both sides of the tray. This can be done with a dremel and/or sand paper. This will make it easier it install and remove the Reef Diaper.