SHUNTING Filter Foam Sponges — Filter Media Pad, Filter Sponge, CuttoSize Foam for Aquarium Fish Tank (19.6' x 19.6' x 0.79' — 25 PPI — 1 Pc) Why choose this filter foam : Large 19.6' x 19.6' sheet that can be cut to the exact shape and size needed for your aquarium filter, sponge filter, sump, or DIY filtration setup. Effective mechanical and biological support: 25 PPI (pores per inch) opencell foam traps debris while providing abundant surface area for beneficial bacteria colonization. Costeffective and reusable: One full sheet lets you create multiple pads or worn pieces as needed, reducing the need to precut pads frequently. Key attributes Brand: SHUNTING Product type: Filter foam sponge / filter media pad Size: 19.6' x 19.6' x 0.79' (one piece) Pore size: 25 PPI — fine pore density suitable for trapping small particles and supporting biological filtration Format: Cuttosize sheet for easy Functionality and performance Mechanical filtration: Captures uneaten food, fish waste, and suspended particles before they reach finer media or pumps, helping keep water clearer and protecting equipment. Biological filtration support: The opencell structure provides a large surface area for nitrifying bacteria, contributing to efficient ammonia and nitrite processing in established aquariums. Versatile placement: Use as a prefilter layer, main filter pad, or within custom filter boxes. Compatibility Fits many common aquarium filtration applications including hangonback filters, canister prefilters, sump compartments, sponge filters, and DIY filtration systems. Because the sheet is cuttosize, it can be adapted to different models and brands. Maintenance and care Rinse in tank water during routine maintenance to remove trapped debris while preserving beneficial bacteria. portions or the entire sheet as needed based on wear and clogging. The single 19.6' sheet gives flexibility to only the used section. Use cases Freshwater community tank: Cut the sheet into small pads to use as a prefilter in hangonback units to reduce clogging of fine floss and extend the life of chemical media. Breeding or fry tanks: Use a fine 25 PPI sponge layer to trap fine particulate waste while providing gentle water flow suitable for small fry and shrimp. DIY sump or filter box: Create customsized filter layers for multistage filtration setups — mechanical front layer, biological middle layer, or polishing pad as needed. What's included SHUNTING filter foam sponge sheet, 19.6' x 19.6' x 0.79' — 25 PPI — 1 piece Practical tips Measure the filter compartment before cutting and mark the foam for a clean fit. only the worn or clogged section when possible to maximize value from the full sheet. This SHUNTING cuttosize filter foam sheet delivers flexible sizing, a fine 25 PPI pore structure, and a practical solution for improving mechanical and biological filtration in aquarium setups.