Thanks Kris, I'll definitely let you know.
I had a mix of pukani, tonga branch, and fiji in my first tank...marco in my most recent build. With the scape I have in mind, I'll probably be doing a lot of reshaping to the rocks. The denser marco rock that I've been playing around with, although easier to reshape than fiji rock, has still proven to be pretty stubborn when I take a chisel to it. Maybe I need more practice, but pieces seem to split rather than allow me to chip away small sections like I could with the pukani.