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Originally Posted by liveaquaria
Fiji Cultured rock is man made pieces of rock made from aragonite, shells, and rubble that are fused together with concrete.
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looks like concrete to me, lol, from what ive read about home made rock, they make it pourous by adding large chunks of rock salt, or something else that will disolve after the concrete sets up, and im not really sure, but ive also read about dripping it into water or something making the small round balls that are all fused together, ive seen some really good examples of concrete that looks amazingly just like fiji rock. but you have to cure it in water for i think around 3 or 4 months till the ph stabilizes, and then cycle it.