Flat rocks for zoas.
Okay so I was at a fellow reefers buying some frags and noticed his zoas were all on this flat thin brittle rock.
When I asked him where he got them he stated he makes them.
I asked out of what and all he said and would say is special cement....
I was wondering if anyone has any ideas of what type of cement could be used for this application.
I have heard Portland Cement but the amount of different types of Portland Cement is ridiculous....
If anyone can comment with exact types or locations to purchase and brands would be greatly appreciated!
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