Starting up my first saltwater tank. Have had freshwater tanks for years and wife has always wanted a salt tank. So after many years of nagging I have given in but now I am totally lost!!?!!?!!?! I just bought a protein skimmer that I am going install in my sump and reading directions there r two set ups bubble production diffuser set-up or collection cup set-up. Is one better for saltwater and or which one should use?