U-Tube with Directional Return (1 Inch) Eels Electric blue squiggles run vertically

Electric blue squiggles run vertically from its gill covers to its tail

Select the overflow according to the actual return-pump flow reaching the aquarium after head-pressure loss

Maintain stable alkalinity

cell sizes

U-Tube with Directional Return (1 Inch) Eels Electric blue squiggles run verticallyU Tube with Directional Return (1 Inch) U Tube with Directional Return (1 Inch) is a larger aquarium return U tube with an adjustable directional nozzle for 1 inch inside diameter flexible vinyl tubing. 1 Inch Over Rim Return U Tube This return fitting provides a clean way to bring water from a sump, utility pump or external plumbing line back into the aquarium. The directional nozzle lets the user aim return flow to improve circulation, surface