I used the reef saver, and I don't have any complaints. I have alagae, but I expected that. If I had it to over again, I would "cure" the reef saver rock even though you don't really have to. Any edge to minimize phosphate leeching and algae is worth the effort. It was easy to sculpt, scape and epoxy. I got 30 pounds for a 32 gallon biocube and used most it. Good shapes and had some rubble left over for the back chamber and I made some individual frag holders and even a couple of frag plugs with the leftovers.