Does live rock have a life span?

[Aquattro]

Originally Posted by Leah

A while back I thought I read on here rock should be replaced at 10 years. And if my memory serves me right (however highly doubtful) was it not you Brad that brought this up?

I may have brought up replacing, but not at any given time frame. I've seen tanks turn to sewage at 4 years, and tanks still running well after 10..