porosity, cuttosize filter foam designed for aquarium use. This 60PPI bio sponge filter pad combines fine pore structure with a slim profile so you can trim it to fit sponge filters, intake screens, canister prefilters and DIY filtration projects. Key benefits Effective mechanical and biological filtration: 60PPI pore density traps fine debris while providing surface area for beneficial bacteria to colonize. Custom fit: Large 39.3 in x 39.3 in sheet can be cut to any shape or size to match your filter, pump intake, or custom filter compartment. Thin profile for versatile use: 0.11 in (3 mm) thickness works well where space is limited or as a final polishing layer. Saves time and expense: or upgrade worn pads without buying a whole cartridge — cut multiple pieces from one sheet. Product attributes Model/Type: Filter Foam Sponges / 60PPI Bio Sponge Filter Pad Size: 39.3 in x 39.3 in x 0.11 in (3 mm) Pore density: 60 PPI (pores per inch) Form: Cuttosize sheet, easy to trim with scissors or a utility knife Use: Aquarium fish tanks and related filtration applications Performance and handling Fine pore structure captures suspended particles while supporting nitrifying bacteria for biological filtration. Thin, flexible sheet fits flat or wrapped configurations and can be layered for increased mechanical removal or deeper media depth. Simple maintenance: remove, gently rinse in tank water to preserve beneficial bacteria, and reinstall. when permanently clogged or worn. Suggested applications Replacement pad for sponge filters: Trim to exact dimensions for direct swap or upgrade. Intake/pump prefilter: Cut to fit pump or powerhead intakes to protect small livestock and reduce clogging. DIY and custom filtration: Create layered filter stacks, refugium covers, or polishing pads for sump compartments and hangonback units. Who this is for Hobbyists who want a flexible, economical way to or filter media. Breeders and nano tank keepers needing thin, fine media that can be shaped for small filter housings. Aquarists building or modifying filtration systems who require a large sheet to cut multiple pieces. Care notes For routine maintenance, rinse gently in aquarium water to avoid removing too much beneficial bacteria. when physical breakdown or irreversible clogging occurs. Exact specifications are reflected in the product title: Filter Foam Sponges, 60PPI Bio Sponge Filter Pad, CuttoSize Foam for Aquarium Fish Tank — 39.3 in x 39.3 in x 0.11 in (3 mm).