calcium carbonate rock...

[Bob I]

no it is less porous and actualy mined. basically a old reef that was covered with land and compressed and petrified.

it is good for baserock but i would still buy live rock for on top of it.

Steve

I am not sure about being less porous. Ross just picked me up a chunk, and it is surprisingly porous. I was impressed, and am getting more. I think he said it is $8.00/Kg. That is a lot better than $9.00/Lb. I have an older piece that is covered with Coraline algae. It looks a lot like other base type rock.