Refuge/Sump????

[tscuda]

I got my 55 gal up and running fine. 55lbs LR 60lbs live sand. No crew or fish yet.
Will I need a Refuge or sump? If so what size? Only plan on having 3 maybe 4 fish. And whats the diff between the two??????

 

[tscuda]

Bump

 

[rainfishy]

Do a search on this site and you'll get tons of info on sumps and refugiums, what they do, how they're different, etc. Good Luck