cement for DIY rocks

[Kronk]

I am goign to be making up a batch of DIY rocks soon and I am wondering why Oyster Shells? Is it just for the texture or does it help by adding calciuim?

By the way Buckerfields right off #1 Hwy in Abbotsford has crushed oyster shells in Bulk.

[Doug]

This is a piece of homemade rock, that Mike did a few years ago. Cant tell it form the other now, except for the different look from its materials. Its supporting a main portion of my reef.

I can take a better pic if you wish. rock.jpg

[Reefer Rob]

Originally Posted by Kronk

I am goign to be making up a batch of DIY rocks soon and I am wondering why Oyster Shells? Is it just for the texture or does it help by adding calciuim?

By the way Buckerfields right off #1 Hwy in Abbotsford has crushed oyster shells in Bulk.

Oyster shells are just to add texture. I used aquarium gravel in mine, but I think oyster shells would give a coarser look.