Plumbing size needed for oceanic 180 gallon

[PlagueBorne85]

Good morning I just bought my very first large tank. It’s an oceanic 180 gallon. Looking to run a sump, and protein skimmer, also want to plumb it I’m looking for the right size of plumbing any advise would be great. Just want to make sure it’s Good! It’s 6ftL by 24w by 2ft H.

 

[monkeyCmonkeyDo]

Is it already drilled and has an overflow? Do you know what size bulkheads it has? Needs? This will tell you what size pipe.
D

 

[PlagueBorne85]

Is it already drilled and has an overflow? Do you know what size bulkheads it has? Needs? This will tell you what size pipe.
D

It is drilled in about 7 different places it has different size bulk heads. Looks like 1 to 2 inches on the mains and has 4 3/4 to 1 inch loc lines