Aquarium Pharmaceuticals Filstar (Filter) XP1 Canister Unmatched Efficiency and Reliability. Adaptable to All Types of Aquariums. Unique Anti-Airlock System. Extremely Quiet. 250 U.S. GPH Aquarium Volume - Up to 45 U.S. Gallons Maximum Water Head 47" (1.2 m) Bypass-free: ensures complete water flow through the filter media. Disposabl...