A while ago(3-4 years ago) when I first started my tank, I used Dry rock. I never got coralline algae to grow even though my calcium is at about 400-420 and my dkh is at 10-11. I am now wondering if my dry rock is now live and how would I know if it is. I am honestly just assuming its live since it has been in my tank for so long lol... Also if anyone has any suggestions on why I don't have coralline that would be great too!