Fluval FX Series Spray Bar Kit (FX2/FX4/FX6) – An accessory that attaches to the output of Fluval FX canister filters to diffuse water return. The spray bar distributes outflow evenly across the aquarium, reducing strong currents and improving surface agitation for better gas exchange. By eliminating “dead spots” and gentlely circulating water, this kit helps create uniform water conditions throughout large tanks, benefiting both fish and plants.