yea, its gonna depend... i've got a lower flow setup when compared to some... i have (comming up from the sump) about 500GPH comming in through a SCWD, and then another 350GPH comming in through the factory returns, and then i have 2 K1's (400GPH) and 1 K2 (600)and thats it... so total i have 2200gph theoretically, so thats just a tad over 10X total, sump and all...