Hello there! I am new to this whole Filter sump thing, im starting a 120 gallon reef tank. (largest ive ever done) and i want to make sure i get the right filter media in my sump. Let me start by saying i am going to have 150 pounds of live rock in my tank, I will also be using live sand. I already have 2 Phosban reactors. one is going to have nitrate and nitrite reducing media inside, the other one will have phosphate reducing media inside, I have a protein skimmer that is rated for a 250 gallon aquarium, So now i am stuck with what to put into my sump. OR if i should us it as a refugium? Like i said before Ive never previously used a sump before AND this is the biggest tank ive done so i want to get it right the first time. All input is much appreciated!!