Mines 24x15x15 wish i bought a longer one. But i use a mrc2 skimmer outside the sump, Mine moves water around like Niagara falls in my sump and the return on my mrc2 is like a complete separate fall of it's own in there.
Current tanks: 120 reef, 45 hex reef, 150 gallon reef, 20 gallon quarantine, 2-40 gallon frag tanks all glass,40 gallon sump, mrc2 skimmer, Digital Aquatics controls, Panworld 50px and 100px return pump system, BRS phosphate reactor.3-250 MH lighting with 4 blue actinics and full DA moonlight system.