I have a 610g we are using 2 fx6 to keep the tank running. We where using our old 125 for our sump but have been unable to find a replacement to make a new sump. We are considering a 150 stock tank with K1 but I can't figure out how to configure the mechanical filtration and the how to prevent to k1 from getting sucked to the outlet for the pump. I am open to any sump setup suggestions.

