I have two overflows in my tank, it works well and also allows me to beef up the circulation rates if I need to. You cannot even hear the overflow as my turnover is around 1500lph, but it can handle a lot more. My overflow pipes are 32mm (1 1/4") and my return pipe is 24mm (1").
I created an overflow shelf which you can see at the top of the image, behind that is my two overflow pipes.
I'm really happy with it and it allows me to have more 'floor space' and it is nice and easy to clean
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80gal with live rock (35kg/70lbs), 30gal sump, refugium with live rock, chaeto and DSB, Bullet-1 skimmer, Fluidized Reactor, T5 lighting (6 tubes), 4 x Koralia 3's. |