Sponge filters are a simple, dependable filtration option that’s easy to maintain. Since there are no motorized parts, setup only requires an air pump and airline tubing, keeping everything compact inside the aquarium. These filters are reusable, cartridge-free, and built to last for years with proper care. Their gentle flow makes them ideal for bettas, shrimp, fry, and other delicate or slow-swimming fish. Commonly used by breeders, fish farms, and aquarium wholesalers, sponge filters are a low-maintenance solution you can install and rely on long term. Sizing Guide Nano: 5 Gallons and up Small: 10 Gallons and up Medium: 20 Gallons and up Large: 40 Gallons and up Additional Equipment Required The sponge filter requires an external air source to operate. You will need: Air pump Airline tubing Check valve (helps prevent water from siphoning out during power outages) Pore Size: 25 PPI(Actual porosity ratings can vary slightly between manufacturers.)
