- Joined
- Mar 13, 2008
- Messages
- 194
http://www.melevsreef.com/what_sump.html That IMO best explains evrything you need to know about a sump, how it works, and making your own. in short it diverts water from the main big tank(AKA display tank) to a lower area through piping that you put together and is run by valves and pumps and what have you. keeping Live rock the sump would be kinda pointless because it should be in your main tank where everyone can see it.