Eheim Accessories Elbow for 400

-->Pre-Filter ModuleTraps coarse particles before they reach the filter. Replaces intake strainer. Telescoping tube for deeper tanks.Surface ExtractorUse on the intake side of your canister filter. Quietly removes surface sludge and protein buildup.Wide Jet ReturnFits 12mm/16mm tubing.-->Reducing "T" ConnectorUsed for connecting the surface extractor to filters 2217, 2226, and 2228.Oxygen DiffuserFor oxygen enrichment. Can be added to the output hose for mixing air with the water output. (Includes aerator control clamp.) Fits 2213, 2215, and 2217.Suction StarterUse to start, or restart, the siphon for any canister filter. Draws air out and water in.