
Thanks again, everyone, for the replies! Turns out I'm going to need to use an in-sump pump because I'm having a custom sump/refugium made and there isn't enough room inside my stand for an external one. Since I have two Tunze 6101's I'm going to use for flow, Jeff from Lifereef recommended I reduce the drain line down to 1," and use maybe a Mag 9 so I'll get a flow rate of around 900gph.