How Is Sump Size Determined?

[bassman]

The bigger the better.
Get the biggest you can afford and have room for.

[MMAX]

What is a refugium?

[mark]

Originally Posted by MMAX

What is a refugium?

Simply a area without predation (a refuge).

I can be a separate tank, as part of a sump or even a area of the display partitioned off. There's different types though most seem to combine or have for growing macro (nutrient export) and a area for pods that will make it (hopefully) back to the display.