Hello I just got a 125 gallon dual stand predrilled tank. I am unsure how you plumb a tank with dual overflows I saw on here people with one overflow and understand that whole process but never seen two overflows. Can someone helpe me this? I am upgrading from a 30 gallon tank I have had for a few years. I am very excited and want to get going on this right away. What would be an ideal sump size for this size tank? I want to keep a good amount of fish and maybe down the line get into corals.