Yes there are bubbles from SWG. I'm glad I learned that here. Always wondered why I had tiny bubbles coming out of jets. As for the foam, before the spa would get cloudy once I went to spillway mode and then foam appeared when the water splashed into the pool. Now, after cleaning, it looks much more clear and the foam is basically non-existent in spillway mode. However, I still get 4-6" of foam when I turn on the blower. Driving me crazy. I want to sue the algaecide people but it's my fault for pouring in too much.
Sounds like you're on the right course then!