[First the PCV was to high. So I cut it down where it was 1 inch above the water.
I had issues in the input. Bubbles would be to big or not good.
I'm using 1/2" pvc drilled with a fitting on it. Air hose goes on that. Fitting sticks out 1/2 in the pipe so water has to go around it. Doing nothing with the air hose. I played with a air pump and other stuff, the MAG3 works well in the config listed above and get good bubbles. PM me Sunday and I'll take you some pix.]