I have a 180G (6'x2'x2') that is in a wall between two rooms. Since it is viewed from both sides, pump placement needs to be on the ends. I currently have two Hydor pumps on each end (4 total), but I don't feel that I am getting adequate flow, particularly in the center of the tank. I recently had an outbreak of cyano, but only on the rocks in the very center of the tank, which from what I understand, could be a sign that I need more flow. So, I would like to upgrade my pumps, and end up with only two pumps if possible (one on each end). The pumps would need to be placed on the top 1/3rd of each end due to rocks. I don't know if a gyre pump would be best in this application, or if a Nero or Vortech type pump would work best. Also, what size? I have a mixed reef, with only zoas, shrooms, and other soft corals. Thanks in advance for any advice!



