Well alot of the rock came from my 65 gallon. When I upgrade again I will just buy another 100 lbsand let this rock seed it. Ace has me beaten bad on this front though, his tank looks so established. I remember his first photos when it started to become a reef and that blew me away. I really liked the side shots that go all the way through the tank. Alyssa still likes your tank more than mine. lol