Yeah I've got a 210 and my sump is about 75 gallons. It has a pre filter area that is about 12x24" I use pond master fine media pad in it and it drips down to two huge cells of bio balls. Then it runs through a sponge for water polishing to two lifeguard aquatics 5000 pumps. Got two heaters in the sump under the bio balls. I've got plenty of turnover and the water is always crystal clear. I don't run carbon don't know why I just don't. But like the previous poster said go with a sump.