Powerhead for a 29 BC

[Lovge]

Im trying to figure out how many GPH powerhead would be realistic. I need some flow through my tank yes but at what point would it be considered overkill? This is for a 29 biocube.

Ty all in advance

 

[Reefing Madness]

500-800gph is realistic for a Reef. Fish only would only be 300gph

 

[Lovge]

thanks