I an offering 6 pieces of real reef shelf rock at $10 a piece or $50 for all 6.
All 6 have been soaking in salt water treated with Stability for 1 year.
To some degree they are coated with beneficial bacteria.
I have finished my new build and these pieces are left over.
You can see what I am referring to at https://realreefrock.com/product-line/
Scroll down to shelf rock.
One box runs for $300+ 6 pieces is about 1/3 box.
You can view what I am offering at https://imgur.com/a/Q64N1TD
I included an 18 inch straight edge for size comparison.
I live in University City (in land from La Jolla). Zip code 92122
If you are interested, contact me at 858-243-7802