I have 2 AC50s on my 36 gallon bow front. I made water baffles from plastic water bottles to keep the current down from the incoming waterfall. It does a really good job and my water is very calm.

With this set up, am I breaking the surface tension of the water?

I have recently removed my air stones and pump and started thinking that I might be suffocating my fish.

Here is a video of the setup.