I have had several types of reef rock over the years. First, Figi live rock, then tonga branch (both which are great) the down side is the cost and pests (which were many). Then I dabbled in aircrete rock which worked fairly well. The downside was the weight.
The hot ticket now seems to be dry rock from the quarry which I hear is good.
Now its on to Ugly Rock. Yes, I do think it’s ugly. Shaping and firing up the clay.