Vivid Creative NOSOK Filter Sock Replacement - 2.75 Inch NOSOK 2.75-Inch Filter Sock Alternative The Vivid Creative NOSOK Filter Sock Replacement - 2.75 Inch offers a practical alternative to washing traditional aquarium filter socks. Designed for compatible nano aquariums all-in-one systems and sump chambers the NOSOK275 can operate with its reusable nylon filter screen or inexpensive disposable filter floss for customizable mechanical filtration. Flexible Filtration with NOSOK275 Designed to replace compatible 2.75-inch aquarium filter socks Central filter core can be wrapped with inexpensive filter floss Heavy-duty reusable nylon screen provides 255-micron mechanical filtration Nylon screen drops directly into the filter cage for simple installation Screen unrolls flat for quick rinsing under running water Dirty filter floss can be discarded and replaced rather than washed Universal Mounting Plate expands compatibility with nano and all-in-one filter chambers NOSOK275 Dimensions and Filtration Area Product model: NOSOK275 Manufacturer SKU: NOSOK-275 Mounting diameter: 2.5 to 3 inches with the included adapter Overall length: 4.9 inches from the mounting point Minimum filter-sock opening: 2.4 inches Nylon screen size when flat: 7.375 x 3.5 inches Approximate filtration surface: 25 square inches Screen mesh size: 255 microns Universal Fit for the Compact NOSOK The NOSOK275 fits compatible 2.75-inch filter-sock locations with an opening at least 2.4 inches in diameter. Its Universal Mounting Plate can be customized for compatible square and rectangular chambers measuring approximately 2.75 to 4.75 inches. Vivid Creative Aquatics also confirms direct compatibility with Waterbox AIO and Eshopps DeskMate aquariums. Installing and Cleaning the 2.75-Inch NOSOK Confirm that the filter chamber has an opening at least 2.4 inches in diameter and enough clearance for the 4.9-inch overall length. Install the appropriate adapter and configure the Universal Mounting Plate for the filter chamber. Place the reusable nylon screen into the filter cage or wrap the central core with filter floss. Install the NOSOK so the aquarium's drain water passes through the selected filtration material. Inspect the screen or filter floss regularly and service it when accumulated debris begins to restrict flow. Remove and rinse the nylon screen under running water or discard and replace used filter floss.