Tideline Adjustable Surface Skimmer for 21.4/31/62/65 Gallon Options:Pair 75" filter sock instead of

75" filter sock instead of the OE 3" socks

Change Poly-fil without removing the bucket

3 trays for chemical or biological media (the 2 middle trays are easily removable if needed)

An excellent replacement for the filter socks that come with the aquarium

Tideline Adjustable Surface Skimmer for 21.4/31/62/65 Gallon Options:Pair 75" filter sock instead ofThe Tideline Adjustable Surface Skimmer is perfect for fresh or saltwater. It effectively keeps your water surface clean and allows for optimum performance. Its easy snap in installation and sleek design make it a convenient addition to your setup. Plus, its adjustable height feature allows you to customize it for your desired water level. Don't let surface film ruin the beauty of your aquarium and harm your aquatic creatures. The Tideline Adjustable