Over the past four years with my 180G reef tank. I have moved the sump to the basement, added a refugium section in the sump, put baffles in the sump to cut back on air bubbles returning to the tank, increased the size of my skimmer, added durio standpipes in the main tank returns to cut back on the noise, added a recirculation with 2 by 3/4" sea swirls to improve water movement after the corals grew in size, added more MH lighting, added Nielsen reactor & calcium reactor.... AND the expense keeps going on & on & onnnnnnn
I am in the process of replacing my sump with an even larger sump & larger skimmer and a larger return pump to further improve circulation. My corals love it and they must have made a deal with my equipment supplier to keep me going in this hobby. I spend a lot of time taking care and enjoying the tank..... Four years and still at it...