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actually the center tank is reef two ends are cichlid tanks I want to change right side to salt 120 gal and leave (for now the 90 gal. cause I love those fish.
Beautiful arrangement of tanks...like the idea of the cichlid tank...From the looks of the gravel (dolomite/crushed coral?) the tank is for African Cichlids. If so, very colorful fish with interesting behavior patterns,
As long as the reef tank is doing well and maintenence is not too difficlt, I'd leave things alone until you make a major change such as replacing the 55. Then I'd tie the refugium to the reef as Sam suggests.