We had a much smaller than that tank 30 years ago, didn’t even know the sump method existed back then. We thought our undergracel filter was top of the line lol. Nice throwback pic!!!With plenty of water movement and lots of live rock in the DT there is no need to turn your sump into a spin drier. One of my most successful tanks had a turnover of once every 3 hours through the sump. Lots of live rock, water movement. Skimmer was also in the sump along with biological media to help keep nitrates in check mainly. This is me about 30 us years ago with said tank.