LARGE Sump ideas....

[MitchM]

I used my old 230g reef display for a sump when I upsized to a 320g display.
I keep the sump water level at a height so that when I turn off the pumps the overflow goes down the drain from the 230 sump and makes water changing simpler. In the past I have separated the various pumps from the rest of the sump by an eggcrate wall, but I only have a couple of large fish, LR and a DSB in there now so I have no eggcrate.
It has fairly slow flow in there so it could be great for macroalgae and LPS.
Water from the main tank enters at one end and returns to the main display at the other.

Mitch