Flow spout for 1 1/2" pipe. Creates much more aeration of the water than just pointing the pipe down into the tank. This is what I have installed in the fish tank of my aquaponic system. Even when my main aeration system went down this was sufficient to keep them healthy until I got the air pump repaired.

Original part is set to public at OnShape. You are welcome to scale up or down to different size pipes. Just search for "Spout for 1.5" pipe (1.9" dia)" and make any changes you want.