You have to change to clean the filter very often. I think this is what is slowing you down. I would go buy a bunch do filter carriages and just change them out daily. Until you are clear. You will probably have to clean the new filter at least once during the day. Just put a new one in the next day.
I have been replacing the filter twice a day. I have two so I let one soak and then rinse off and replace. I do this once in morning and once in the evening. I've also been using a skimmer sock. I'm wondering if it might be better to remove the sock? I just think my pump is just not able to keep up. I'm going to try to vacuum to waste sometime this evening or tomorrow to see if that helps. I haven't exactly figured out how to do that with my setup yet but I have a couple things I want to try.