I am new to this hobby and working on starting up a 125g dual overflow reef tank. I am going to build my own sump and had watched a video with someone who had made a sump with horizontal flow instead of vertical flow and had a refugium in it as well. I had liked the design but can’t find any information on this and doesn't seem that anyone else is using this method. Does anyone know the cons and pros of this type of sump? They had mentioned in the video that it was more of a natural flow but I don't know if you'd be able to get the bubbles out. It was a flow going right to left in a few spot looking like a river flow. My question would be is if anyone has any knowledge on this and would it be worth the build? Thank you in advanced.