David S
Aquarium Advice Addict
No the water fills the overflow box and then enters the 2 pipes pointing down,the 3rd pipe pointing up is the emergency pipe in case the other 2 get blocked,this is known as the coast to coast,This is what I would use.Ok, I see how the water gets into the overflows, kinda like my cube. When the water is behind the overflow cover is there a hole in the glass for the water to go down to the filter? Or do you still have to buy overflow boxes to go over the lip?