OK guys I have decided on a solution..... I am going to use the common sump method, with a slight twist... I have calculated the overflow volume to be 25 gallons +- between the two tanks in the event of a Power loss.... Bought new 37 gallon tank today for sump... Since I want the majority of the overflow from the 55 refuge to enter the 150 and vice versa I have segregated the sump with a metered divider ( the higher the water level on one side, the more is allowed to pass to the other) to eliminate any dualing pump scenario.. I will be overflowing the 55 into the 150 pump side and the 150 will overflow into the 55 pump side... This way I have powerloss protection for both tanks, height is no issue between the two, and I get maximum cross flow between the tanks.... How does this sound?
I own my Aquarium..... I am God of these 5 cubic feet..... My ignorant mistakes sweep though this tiny world like a plague of biblical proportions...