The Irrigator is a multi-outlet powerhead attachment designed to bring water movement into hard-to-reach, low-current parts of your aquarium. It reduces stagnant and dead spots by spreading current into the multiple outlets.This will help to alleviate detritus accumulation in low current areas of your tank. Best of all you can hide the powerhead behind the rocks and just run airline tubing to these dead spots!!! Each irrigator package includes: * Irrigator showerhead * Large elbow - will fit 3/4" I.D. slip * Small elbow - will fit 1/2" I.D. slip * Flexible ties (10) * 350 cm black silicone airline tubing * Plugs (5) Irrigator Powerhead has an output of 475 GPH @ 0' head. Suitable for marine or freshwater, internal or external use. Max. water height = 80". CE & ETL listed. Connection between the Irrigator & the Irrigator Powerhead may require the use of Teflon tape.