Quote:
Originally Posted by fishytime
while the dense pieces are full of holes, all these holes are, is surface area.....the holes are almost solid and smooth.....good live rock is like a sponge, porous to the core, becoming "live" all the way through....
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Hmmm, thanks for the explanation. It does make sense that true live rock would be more porous.
I now have a 50/50 mixture of live and marco rock. I didn't notice a difference in weight, and my tanks are doing fine with it. But after reading this, I may just add live rock if I need any more in the future.