For the first week it pulled out a lot, like 5 gallons worth of wet skimming. Now its calmed down, but what it pulls out is especially nasty and I've needed to change the filter bag that my overflows go into more often. I need to clean the skimmer out now, its pretty gunked up and i just cleaned it like 10 days ago. Also, my last water change was 3 weeks ago where previously I'd been changing about 10% weekly.