SUMP and Filtration - 60 Gallons acrylic sump connect with 27 gallons cute
I only used one pump (ReeFlo Hammerhead/Barracuda Gold Hybrid Pump (6000/4600 GPH)) to control the whole system - Return, GFO, Carbon and Chiller.
This is a little dangerous if the pump fail. However, the circulation pump will keep my live stock alive for few days..