Aquarium filter diffuser

Aquarium filter diffuser and also oxygenation water.
I can change the diameter of diffuser y you want for your filter just tell me.
I think It is a very useful device because in my case I have a very powerful filter.

Update 2019-05-01

I added the solidworks pice if you want to change the pipe diameter, I made it in solidworks 2016 and I added the *.step file.