I use red sea prizms on my 90 gallon and 125 gallons salt water and my 55 african cichlid tank, I Love them and i think they do a great job, in my 90 gallon i have 3 tangs which i have had over 2 yrs and my 125 is butterflys, and a flag fin angel, so i would say it does a great job. I have other high end skimmers on my show tank, but for a 75 gallon tank, Its perfect. and i dont think its noisy at all. i clean it about once a week. and its very simple to use.