3/4" is fine. What bulkheads do you have? Also start looking at what pump you want because it could have either a 1" or 3/4" fittings
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180 Mixed Reef
SRO-5000 Skimmer
Neptune APEX Gold
Kessil AP700/ MP60+6105
Kalk+2 part/ Cheato Fuge
Current Tank Info: 180 SPS Dominant
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