Sump ?

[branw1]

What size sump for a 90g? I keep reading about refugiums. Not sure if I need that since I probably will be FOWLR.

 

[Grizz]

The best size for a sump is as big as you can fit. The fuge will give you a place to grow pods (great snack for the fish) as well as macro algae which will help remove nutrients and keep the PH stable.