Backflow Prevention Input Needed

[bassman]

Originally Posted by Joe Reefer

If I were you I wouldn't go this route, unless your sump is twice the volume of the display your going to end up with a mirco bubble problem. A CL would be a way better alternative or maybe some stream or vortex pumps. Just a thought.

My main tank will be 120 gallons and the sump will be 185 gallons.
Why would I have micro bubble problems?