Hey David,
Any of that un-live rock pretty good size pieces? We are about to set up Mike's FOWLR again and I could really use a couple of decent size pieces to add to the rock-scape. He mostly has the roundish softball sized pieces that make for an excellent mounded up pile of rocks and I prefer the more structurally interesting shapes (variety of sizes) to make bridges, caves, columns, etc.

PS: Saw your edit above... it's "porous"