For my 120, which is a mix of LR, fish and some lps/sps. I have 1 Vortech on Reef Crest 75% power - 2250 gps, 2 Tunze 6045 = 2200, and return pump @1100, so total would be roughly 5500 gps. I reduce the Vortech sometimes as it is blowing sand all over the place. Prior to the Vortech, I had two mod maxi jet 1200 = 4200 gps on a wave maker and they worked great.