SeanMonster
Aquarium Advice Addict
Kio, my 180g has 2 corner overflows that return to a sump (I think it's 40g). Each overflow returns to its own chamber. In the 3rd I have a Coralife 220 Super Skimmer, 2-300 watt heaters, Purigen bag, carbon bag, and a 1200 gph pump that provides return flow. My tank is a FO, but you've seen the pic showing how clear the water is.