Sump?

[bbarrett2868]

What is the purpose of a sump?

 

[SeanT]

To expand water volume and as a place to put unsightly equipment you don't want in your main tank; such as skimmers, heaters, temperature, pH, ORP, probes, carbon filters, water top off, Calcium Reactor's, etc. etc. etc.

 

[hairymushroom]

I agree with SeanT, the extra water volume adds more stability to your tank allowing for more stable parameters etc. and keeps unsightly equipment out your display.

Also by including a refugium into your sump you can have great natural nitrate reduction by means of a deep sand bed and/or growing macro algae.

HTH

 

[ihopss]

And a place to the money.