I believe the SWG needs 20 GPM to guarantee proper operation.

Not so worried about the bubble at the top of the basket on low speed but the stream of small bubbles moving around inside the basket worry me more. I was wondering if not getting enough flow from the suction side could cause something like this- I plan to re-plumb the suction side to get rid of all the crazy elbows and see if that solves the bubbles/low flow problem.