Increase the water flow in your tank with this 3D-printed penductor. Two sizes available: 3/4" (fits locline tubing) and 1" plumbing (includes screw-in knuckle).
The inner cone has twisted fins to help randomize the flow as it shoots into the display tank. No moving parts to fail.
melev's recommendation: Install these at least 2" (mine are at 4") beneath the water's surface to avoid sucking air into these nozzles. Make sure your sump can hold all the water that drains in the event of a power outage. I use two 1" RFG (random flow generator) nozzles in my 400g reef, as seen in many of my videos.
Penductors increase flow rate by using a venturi effect.