The LR has life from the inside out. Base rock that we add becomes live from the outside in, and is less effective filtration. You can do a "low impact" or "green" reef using only live base rock, and/or aquacultured LR. Just doesn't look the same as LR out of the Ocean. My Reef was started with 50lbs Base Rock, and just 20lbs of Live Rock, and I do my best to hide the Base Rock.
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