Microbubble advice

[rob020880]

Hello,

I am having a slight micro bubble problem with my tank. It is not too bad but I want to eliminate them completely. First I will tell you about my setup and it would be great if you found the cause.

The tank is 130 gal. and the sump is an ADHI 30 which I assume is 30 gal. in size. The return pump is a mag drive 9.5 where it is pumping about 4-5 ft of head. I am also using a 100 micron filter sock on the drain. There is also a baffle in the sump and I have this filled with mesh bags of carbon.

My concern is that my return pump may be to strong for the setup and is what is causing the bubbles. What do you think?