Red Sea Fish Pharm ARE50184 Deluxe Prizm Upgrade Kit Protein Skimmer for Aquarium Conversion kit that allows any prism skimmer to be upgraded to a deluxe version The prism upgrade kit is made of high quality and top of the line materials to ensure outstanding performance once installed in your aquarium Includes new main tube, skimmer attachment and media container Kit is a great must-have to any aquarist in maintaining good water quality Using this upgrade kit is easy because it comes with a complete, detailed instruction manual so you can install it properly in your tank