Oceanic Reef Ready Tanks: Each Oceanic Reef Ready® aquarium is pre-drilled with a starphire glass center brace and includes megaflow overflow(s) and the overflow accessory kit(s).
The comment about the "starphire center brace" is a general comment that refers to any of the reef-ready tanks that MIGHT have a center brace, not the 58 gallon specifically. The 58 does NOT have the center brace. I'm looking at mine right now.