Offering outstanding 3-stage filtration, increased water movement and vital aeration, fluval u-series internal filters are the perfect solution where external filtration is not possible.. Features. Designed for aquariums up to 110 l. Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums. Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature. Position vertically against aquarium wall to create currents or customized flow patterns. Convenient flip-top lid allows for quick and easy access to filter cartridge for maintenance or replacement. Adjustable 3-way flow control. Top output for circulation and oxygenation, integrated spray bar for a gentle even flow, and bottom output for deepwater agitation. Biomax biological media included. Made in italy. Ideal for freshwater, saltwater and reptile environments. What's included. 2 Foam pads. 2 Poly carbon cartridges. Biomax biological rings