Live rock for 10g

I don't think you will have more success per se with one over the other. I find Fiji rock nice, usually with good color and very porus so you get bigger rocks that weigh less than some other rock. Tonga branch rock is nice for getting shapes and making caves. It is quite heavy for its size but if you are stocking a nano you won't see a huge difference.
More info at
http://www.wetwebmedia.com/liverock1.htm
 
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