He's using them as a base for the finer limestone. They are a PITA to walk on, and are kinda bumpy for a road, but used as he's using them, I think they'll work great. They are about 2" dia. Not round and smooth, but irregular shaped.


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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).