Hi all I'm soon setting up my new tank 72x24x30 high it will have a 54x18x15 high sump which I got made to house a pre filter skimmer and mud as time has pasted I'm not sure weather to go with mud or not as I'm not putting live rock in the show tank it will have reef rock the idea is to keep any bad boys away from my LPS I'm now thinking should I just go with live rock in the sump or rock and mud any input would be great cheers in advance. PETE