After 3 days running the filter, I'm extremely happy. I have it running at half flow rate, and it's incredubly quiet! It'sa pretty big, si I had to move the door from my stand a little forward. But while Iran it with the door open, it only made a faint hum. I When I ran it full powere, not much different. What I called a weak pump was actually user error! I was supposed to keep outflow hose ABOVE water, where as the 2028's I have ask for them to be IN the water! Once I re-read the instructions, and made this minor yet crucial adjustment, priming was better that my 2028's.. I have more to follw, to be added after tests have been ran.