That is a great little tid bit of info
The way I understood "live rock" Was alot like my bio media now
Big sumps need tons of ceramics so I used to have 45 gallon drums with powerheads bubbling away with sacs of them and seed fish to get it live and cycled before a build.
I dont want a full on reef in a week or two... Ill kill it.... But i would like to take a few months building and adding to a frame that will one day next year or the year after look like some of your guys tanks.