Hello, I just purchased a used 125 gallons long canopy that I will be using as a reef aquarium with fish. I also brought a 3 compartment Tsunami sump, that has a dual sock filter for which I never had a sump before. The whole saltwater thing is somewhat new to me. My question is, where do I place the skimmer in the sump? Will it be placed in the middle of the sump or the end of the sump.