Agrocrete experiences

[jgoldsney]

I have seen a number of postings here from people who have made agrocrete rocks for their aquariums....

Does anyone have any comments on how their tank has faired with the agrocrete rocks (any phosphate issues from the oyster shells?)

Has anyone had any luck with getting coraline algae to grow on the agrocrete (this was my major problem when I tried this a few years ago)

Any comments in general on agrocrete rocks would be great.

thanks in advance

Joel