A simple straightforward upgrade - nothing fancy except the tank .
Thanks everyone in here especially Will (@Turkeysammich) and Max (@popper) to make this happen.
Tank: Starfire glass 186 gallons - 60x26x27
Skimmer: 10 yrs old classic Reef Octopus 150-int - upgrade when needed.
Lights: old 2 x Smatfarms G5 + 36" led bar + 1 new Smatfarm G5. Will add extra led bar, Smatfarm or A8SE (XR30 knockoff) when needed
Power heads: reuse 2 x Jebao MLW-30. Consider to buy 2 x Jebao MLW-20 or MCP-150 (gyre crossflow)
Return pumps: reuse 1 x Jebao MDP-5000 + 1 new MDP-10000
All clean with citric acid
Making rodi, mixing salts in tank and ready for plumbing