AQUANEAT Powerhead Submersible Aquarium Water Pump Undergravel Filter Hydroponics

Amazon.com Price: $5.69 (as of 25/03/2022 10:36 PST- Details)

Length: 32.5″
Comes in three sizes of inner diameters (5/8″, 3/4″, 7/8″)
Durable yet flexible; kink-free