hello out there. i am very much new to saltwater aquariums. had fish my entire life from snakeheads to pirhanna to africans. have a couple friends reefkeeping so that will help me lots along my way to my start up. i am setting up a 75 gallon dt with a 40 gallon sump. i am making my sump system myself with a 40 gallon aquarium and a good friend who owns a custom plastic shop. this is my design i mocked up with foamboard as a template, the intake chamber isnt cut out yet because i dont have the measurements for my filter sock. here are some pictures for some opinions. and also not sure if i should run my skimmer before the fuge or after, any thoughts good or bad are appreciated.