Fluval U4 Aquarium Underwater Filter

From the Fluval range. U series: u4 internal filter. 3 stage filtration: Foam pad removes large particles (replace every 6 months), Poly/ carbon cartridge traps fine debris & removes impurities (replace every month), Bio max provides optimal biological filtration efficiency (replace every 6 months). Features: Adjustable 3- way flow: Top output for maximum circulation & oxygenation, Integrated spray bar provides even, gentle flow for planted aquariums, Bottom output for deep water agitation. Enhanced flow. Healthier water. Easier cleaning. Flip top for simple, quick & easy maintenance. Filter includes all biological media. For use with freshwater, saltwater & reptile environments. U4 for aquariums up to 240 ltrs/65us gals (1000 l/h).