Just thought I would do one more update on this thread. I have had mine running for about 3 weeks and did a rough measurment of gph today. With all the media in, it was significantly lower than rated which is what is expected. Mine is approximately running about 160gph, which I am happy with because it has more flow than a fluval 305, rena xp3, and ehiems 2215. I was hoping to get closer to 200gph with all the media and gunk in it, but for the price($105 shipped) I can't really complain.