Is it just my bad eyes, or do you have only one baffle in there? If so that would be the first thing to address. I like two sets of "over-under-overs", or "under-over-unders" myself, which may be overkill, but I think a lot of people do something similar. One baffle won't block a lot I don't think. Also, (and again this may be my eyes), but is the water level in the sump way above the baffle? It seems really high to me. I don't honestly know if that has anything to do with your bubble issue, but I wanted to make sure you've left enough room in there in the case of a power outage. Have you tested that to make sure your sump doesn't overflow when power goes out?