[David]

...it's right on the tip of my tounge but I just can't remember. I have seen it discussed on this board so I know someone can help. What I am looking for is that "light weight" cement that people use to make artificial live rock, tank decorations, etc. If you know what I'm talking about please respond and also tell me where I can get it, HD? Thanks, David.

[scubadude]

I think you are referring to aragocrete or lace rock.....If so then you can go to my website, and I have a section that explains everything you need to get and how to do it. here is the link

http://members.home.net/tents3/diylr.html

[David]

I remembered, that's the stuff I was thinking about. Can anyone tell me anything about it? Tank / reef safe? Easy / hard to work with? As always, tia.

[scubadude]

Originally posted by David
I remembered, that's the stuff I was thinking about. Can anyone tell me anything about it? Tank / reef safe? Easy / hard to work with? As always, tia.

There are 3 different types of portland.....I think all of them are reef safe you just need to make sure you cure the rock long enough so it leeches all the phosphates out