im in the process of setting up a tank. i would like it to be a reef tank, im going to take everything slow and even debated about just trying to develop the brs dry pukani for awhile and then slowly add coral and fish. i will have a bean animal external overflow. now for the questions... is there any advantage of doing skimmer/return/refugium vs skimmer/refugium/return???? will chaeto benefit my tank? if im not mistaken it helps lower nitrates? and also helps pod production.