I just adjusted everything in my ref, now there are little to no microbubbles in the ref, however I am still getting MicroBubbles in my main tank?? It looks like this may be coming from the powerhead, but I am not sure if it is just blowing the MicroBubbles out as it takes them in.

My antisiphon hole is below water level by about 2 inches and is not taking in air, my powerhead is about 6 inches underwater and while it will occasionally create a vortex, it only shows on the surface maybe 1/4 to 1/2 inch in size then goes away in a couple of seconds without ever reaching the powerhead.

I checked the baffle for the return pump and I have to study for several minutes to locate any microbubbles so I can eliminate that.

The last thing I think it could be is the actual external return pump causing air pockets/bubbles to form.

The question is how to I correct this issue?

Is there something I can do the Seio or the pump to stop or eliminate them as possibilities?

Thanks