[Chino]

I second masterswimmer, Id go with more porous rock such as fiji than dense rock such as tonga. Like Indyreef said, it really depends on where you buy the rock. TBS ships their rock with water which helps the survival rate but Im not sure what others ship this way also. If I couldve afforded to purchase LR online, I wouldve definately bought some from TBS. Their rock is just awesome. You might have some die off but if youre starting a new tank, you need a lil die off anyway to kick start the cycle process. IMO the more porous the more beneficial. I bought some fiji locally and it was loaded with life on it. Feather dusters, worms, snails, pods ect...was what was on the rock.