Modular Marine vs Reef Synergy 20 in External Overflow?

[WVReefJunkie]

Which of these two overflows do you think is best for a 315 gallon aquarium?

 

[GQuinn]

i Liked my modular marine overflow. it was well built, quiet and durable.

 

[justingraham]

Synergy will be loud if you plan on having high flow inside the tank

 

[justingraham]

I would check out exotic marine

 

[ca1ore]

MM is a much better overflow.

 

[sp1187]

Reef Savvy as another option.