I can't say as I have never bought farmed just natural from the ocean. What I can say is a box is 45 pounds so I'm thinking it's pretty dense. It might be Fiji ocean farmed but it's manmade rock. The Aussie is about the lightest real rock but also the most expensive at around $25 a pound. I think a box of that comes in at 40 pounds. Then again, I got 25 pounds of Aussie to try out and it had a 10lb boulder in there, but the other pieces were pretty light.Anyone gotten any lately, I am absolutely interested if anyone can vouch for how live the rock is, and how porous. Looking at the video on that site, I just see less life on the Walt Smith rock compared to KP aquatics, but it is hard to tell honestly.

