Function at a low return rate even when booster pump is not on? I replaced my old pressure side pool cleaner with a new Dolphin and I noticed today that it still was returning water out the return hole even though I've disconnected the booster pump since I don't use it anymore. Also, is it normal for the pool returns to make bubble noises intermittently? It appeared like the returns were intermittently shooting out air but when I felt in front they were all blowing hard. Maybe I'm just being paranoid since this is our first pool, everything appears to be working as it should.